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Sudsiri CJ, Ritchie RJ. Influence of Na+ disorder on cytoplasmic conductivity and cellular electromagnetic (EM) energy absorption of human erythrocytes (PONE-D-21-36089). PLoS One 2023; 18:e0277044. [PMID: 36821542 PMCID: PMC9949639 DOI: 10.1371/journal.pone.0277044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 10/18/2022] [Indexed: 02/24/2023] Open
Abstract
Cytoplasmic conductivity of human erythrocytes may be significantly disturbed by the composition of the external suspending media. Effects of external NaCl on cytoplasmic conductivity of human erythrocyte (Human Red Blood Cells, HRBC) were investigated in a simple NaCl system. Using thermodynamic theory cytoplasmic conductivities could be calculated from internal [K+], [Na+], [Cl-] and [HCO3-]. Effect of cell volume and cell water changes were introduced and allowed for using the Debye-Hückel-Onsager relation and Walden's rule of viscosity. Cell volume and cell water change of HRBCs were measured in suspending isotonic solutions with conductivities from 0.50 S m-1 up to hypertonic solutions of conductivity of 2.02 S m-1 at selected temperatures of 25°C (standard benchmark temperature) and 37°C (physiological temperature). In isotonic solutions, cytoplasmic conductivity of human erythrocyte decreases with rise in the external media ionic concentration and vice versa for hypertonic solutions. The HRBC is capable of rapidly regulating its volume (and shape) over quite a wide range of osmolality. Specific Absorption Rate (SAR, 900 MHz) values (W kg-1) of electromagnetic radiation are below safe limits at non-physiological 25°C but above legal limits at 37°C [National Council on Radiation Protection and Measurements, NCRP]. However, at 37°C under both hypertonic [Na+] and isotonic but low [Na+], SAR increases further beyond legal limits.
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Affiliation(s)
- Chadapust J. Sudsiri
- Department of Industrial Management, Faculty of Sciences and Industrial Technology, Prince of Songkla University, Suratthani, Thailand
| | - Raymond J. Ritchie
- Biotechnology of Electromechanics Research Unit, Faculty of Technology and Environment, Prince of Songkla University, Kathu, Phuket, Thailand
- * E-mail: ,
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Jiang M, Wang X, Zhao X, Teng Y, Chen J, Wang J, Yue W. Classification of tumor subtypes leveraging constriction-channel based impedance flow cytometry and optical imaging. Cytometry A 2021; 99:1114-1122. [PMID: 33909347 DOI: 10.1002/cyto.a.24358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/29/2021] [Indexed: 11/06/2022]
Abstract
As label-free biomarkers, electrical properties of single cells have been widely used for cell-type classification and cell-status evaluation. However, as intrinsic bioelectrical markers, previously reported membrane capacitance and cytoplasmic resistance (e.g., specific membrane capacitance Cspecific membrane and cytoplasmic conductivity σcytoplasm ) of tumor subtypes were derived from tens of single cells, lacking statistical significance due to low cell numbers. In this study, tumor subtypes were constructed based on phenotype (treatment with 4-methylumbelliferone) or genotype (knockdown of ROCK1) modifications and then aspirated through a constriction-channel based impedance flow cytometry to characterize single-cell Cspecific membrane and σcytoplasm . Thousands of single tumor cells with phenotype modifications were measured, resulting in significant differences in 1.64 ± 0.43 μF/cm2 vs. 1.55 ± 0.47 μF/cm2 of Cspecific membrane and 0.96 ± 0.37 S/m vs. 1.24 ± 0.47 S/m of σcytoplasm for 95C cells (792 cells of 95C-control vs. 1529 cells of 95C-pheno-mod); 2.56 ± 0.88 μF/cm2 vs. 2.33 ± 0.56 μF/cm2 of Cspecific membrane and 0.83 ± 0.18 S/m vs. 0.93 ± 0.25 S/m of σcytoplasm for H1299 cells (962 cells of H1299-control vs. 637 cells of H1299-pheno-mod). Furthermore, thousands of single tumor cells with genotype modifications were measured, resulting in significant differences in 3.82 ± 0.92 vs. 3.18 ± 0.47 μF/cm2 of Cspecific membrane and 0.47 ± 0.05 vs. 0.52 ± 0.05 S/m of σcytoplasm (1100 cells of A549-control vs. 1100 cells of A549-geno-mod). These results indicate that as intrinsic bioelectrical markers, specific membrane capacitance and cytoplasmic conductivity can be used to classify tumor subtypes.
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Affiliation(s)
- Mei Jiang
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Xiaojie Wang
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Xiaoting Zhao
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Yu Teng
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Jian Chen
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.,School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Junbo Wang
- State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.,School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, China
| | - Wentao Yue
- Central Laboratory, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
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Energy absorption of human red blood cells and conductivity of the cytoplasm influenced by temperature. Biophys Chem 2021; 273:106578. [PMID: 33774523 DOI: 10.1016/j.bpc.2021.106578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 03/09/2021] [Accepted: 03/12/2021] [Indexed: 11/22/2022]
Abstract
The energy absorbed into tissues is known as the specific energy absorption (SAR) which is dependent on conductivity of the tissue. We calculated cytoplasmic conductivity of human red blood cell (HRBC) using the intracellular ionic concentrations and the Debye-Hückel-Onsager relation. The overall concentration is determined by cell volume and cell water content. The calculated HRBC conductivity at 25 o C was σc,25 = 0.5566 ± 0.0146 S m-1, ±SE). It is exponentially related to temperature: Q10 ≈ 1.866. At 37 o C, the calculated SAR value is 1.6 W kg-1 using a linear temperature compensation of conductivity. However, if using a biologically realistic non-linear temperature compensated conductivity, the SAR is ≈ 2.62 ± 0.05 W kg-1. The relationship between SAR and temperature increase is not straightforward. Since there is a wide variance in cellular ionic and water perfusion rates more tissue-specific SAR limits which consider temperature-related factors would be valuable.
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Turcan I, Olariu MA. Dielectrophoretic Manipulation of Cancer Cells and Their Electrical Characterization. ACS COMBINATORIAL SCIENCE 2020; 22:554-578. [PMID: 32786320 DOI: 10.1021/acscombsci.0c00109] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Electromanipulation and electrical characterization of cancerous cells is becoming a topic of high interest as the results reported to date demonstrate a good differentiation among various types of cells from an electrical viewpoint. Dielectrophoresis and broadband dielectric spectroscopy are complementary tools for sorting, identification, and characterization of malignant cells and were successfully used on both primary tumor cells and culture cells as well. However, the literature is presenting a plethora of studies with respect to electrical evaluation of these type of cells, and this review is reporting a collection of information regarding the functioning principles of different types of dielectrophoresis setups, theory of cancer cell polarization, and electrical investigation (including here the polarization mechanisms). The interpretation of electrical characteristics against frequency is discussed with respect to interfacial/Maxwell-Wagner polarization and the parasitic influence of electrode polarization. Moreover, the electrical equivalent circuits specific to biological cells polarizations are discussed for a good understanding of the cells' morphology influence. The review also focuses on advantages of specific low-conductivity buffers employed currently for improving the efficiency of dielectrophoresis and provides a set of synthesized data from the literature highlighting clear differentiation between the crossover frequencies of different cancerous cells.
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Affiliation(s)
- Ina Turcan
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, Profesor Dimitrie Mangeron Boulevard, No. 21−23, Iasi 700050, Romania
| | - Marius Andrei Olariu
- Department of Electrical Measurements and Materials, Faculty of Electrical Engineering and Information Technology, Gheorghe Asachi Technical University of Iasi, Profesor Dimitrie Mangeron Boulevard, No. 21−23, Iasi 700050, Romania
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Gimsa J, Titipornpun K, Stubbe M, Gimsa U. Combined detection of AC-electrokinetic effects: Experiments with three-axial chicken red blood cells. Electrophoresis 2018; 39:2253-2261. [DOI: 10.1002/elps.201800192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/31/2018] [Accepted: 06/04/2018] [Indexed: 01/19/2023]
Affiliation(s)
- Jan Gimsa
- University of Rostock; Department of Biophysics; Rostock Germany
| | - Kanokkan Titipornpun
- Department of Physics, Faculty of Science and Technology; Suratthani Rajabhat University; Surat Thani Thailand
| | - Marco Stubbe
- University of Rostock; Department of Biophysics; Rostock Germany
| | - Ulrike Gimsa
- Institute of Behavioural Physiology; Leibniz Institute for Farm Animal Biology; Dummerstorf Germany
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Sudsiri J, Wachner D, Gimsa J. On the temperature dependence of the dielectric membrane properties of human red blood cells. Bioelectrochemistry 2007; 70:134-40. [PMID: 16713380 DOI: 10.1016/j.bioelechem.2006.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Indexed: 11/29/2022]
Abstract
Electrorotation (ER) spectra of human red blood cells (HRBCs) have been recorded in the frequency range from 10 kHz to 250 MHz in a 4-electrode microchip chamber. The cells were suspended at conductivities in the range from 0.02 to 3.00 S/m (corresponding to an ionic strength range from 1.6 to 343 mM) at temperatures between 10 degrees C and 35 degrees C. Generally, the characteristic frequencies as well as the rotation speeds of the first (membrane-dispersion) and second ER peaks increased with temperature. The rotation speed increase was largely correlated to the temperature dependence of the medium viscosity. Standard temperature dependencies were assumed for the conductivities and permittivities of cytoplasm, membrane, and external solution to explain the frequency shifts, starting from the cell parameters of Gimsa et al. [Gimsa et al., 1996, Biophys. J. 71: 495-506.]. The membrane capacitance was assumed to be temperature independent, based on the permittivity of alkyl-chains. Under these assumptions, the spectra could be well fitted only in a narrow temperature range around 20 degrees C. The temperature dependence of the first characteristic frequency was much stronger than predicted. In addition, around 15 degrees C, an anomalously high rotation speed was observed for the first peak at low external conductivities. Interestingly, this finding corresponds to the change in the chloride transport rate described by Brahm [Brahm, 1977, J. Gen. Physiol. 70: 283-306.].
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Affiliation(s)
- Jutiporn Sudsiri
- University of Rostock, Institute of Biology, Gertrudenstr. 11A, D-18051 Rostock, Germany
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Hölzel R. Nystatin-induced changes in yeast monitored by time-resolved automated single cell electrorotation. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1425:311-8. [PMID: 9795246 DOI: 10.1016/s0304-4165(98)00083-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
A widespread use of electrorotation for the determination of cellular and subcellular properties has been hindered so far by the need for manual recording of cell movements. Therefore a system has been developed that allows the automatic collection of electrorotation spectra of single cells in real time. It employs a hardware based registration of image moments from which object orientation is calculated. Since the camera's video signal is processed without intermediate image storage a high data throughput of about two recordings per second could be achieved independently of image resolution. This made it possible to monitor changes in cell membrane and cytoplasm of the yeast Saccharomyces cerevisiae under the influence of the antibiotic nystatin with a temporal resolution of 3 min. Up to 20 electrorotation spectra of an individual cell could be collected in the frequency range between 1 kHz and 1 GHz. Two distinct events 7 and 75 min after addition of nystatin were observed with a fast increase in membrane permeability accompanied by a nearly simultaneous drop in cytoplasmic conductivity.
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Affiliation(s)
- R Hölzel
- Institut für Biophysik, Freie Universität Berlin, Thielallee 63, D-14195 Berlin, Germany.
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Numerical analysis of the influence of experimental conditions on the accuracy of dielectric parameters derived from electrorotation measurements. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0302-4598(94)05015-m] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Donath E, Egger M, Pastushenko V. Dielectric behavior of the anion-exchange protein of human red blood cells. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0022-0728(90)87477-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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