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Jahnke HG, te Kamp V, Prönnecke C, Schmidt S, Azendorf R, Klupp B, Robitzki AA, Finke S. Novel Multiparametric Bioelectronic Measurement System for Monitoring Virus-Induced Alterations in Functional Neuronal Networks. BIOSENSORS 2024; 14:295. [PMID: 38920600 PMCID: PMC11202209 DOI: 10.3390/bios14060295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 05/29/2024] [Accepted: 06/03/2024] [Indexed: 06/27/2024]
Abstract
Development and optimisation of bioelectronic monitoring techniques like microelectrode array-based field potential measurement and impedance spectroscopy for the functional, label-free and non-invasive monitoring of in vitro neuronal networks is widely investigated in the field of biosensors. Thus, these techniques were individually used to demonstrate the capabilities of, e.g., detecting compound-induced toxicity in neuronal culture models. In contrast, extended application for investigating the effects of central nervous system infecting viruses are rarely described. In this context, we wanted to analyse the effect of herpesviruses on functional neuronal networks. Therefore, we developed a unique hybrid bioelectronic monitoring platform that allows for performing field potential monitoring and impedance spectroscopy on the same microelectrode. In the first step, a neuronal culture model based on primary hippocampal cells from neonatal rats was established with reproducible and stable synchronised electrophysiological network activity after 21 days of cultivation on microelectrode arrays. For a proof of concept, the pseudorabies model virus PrV Kaplan-ΔgG-GFP was applied and the effect on the neuronal networks was monitored by impedance spectroscopy and field potential measurement for 72 h in a multiparametric mode. Analysis of several bioelectronic parameters revealed a virus concentration-dependent degeneration of the neuronal network within 24-48 h, with a significant early change in electrophysiological activity, subsequently leading to a loss of activity and network synchronicity. In conclusion, we successfully developed a microelectrode array-based hybrid bioelectronic measurement platform for quantitative monitoring of pathologic effects of a herpesvirus on electrophysiological active neuronal networks.
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Affiliation(s)
- Heinz-Georg Jahnke
- Centre for Biotechnology and Biomedicine, Biochemical Cell Technology, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany (S.S.)
| | - Verena te Kamp
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany (B.K.)
| | - Christoph Prönnecke
- Centre for Biotechnology and Biomedicine, Biochemical Cell Technology, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany (S.S.)
| | - Sabine Schmidt
- Centre for Biotechnology and Biomedicine, Biochemical Cell Technology, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany (S.S.)
| | - Ronny Azendorf
- Centre for Biotechnology and Biomedicine, Biochemical Cell Technology, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany (S.S.)
| | - Barbara Klupp
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany (B.K.)
| | - Andrea A. Robitzki
- Division Management for Biology, Chemistry and Process Engineering, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Stefan Finke
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493 Greifswald, Germany (B.K.)
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Erdem A, Yildiz E, Senturk H, Maral M. Implementation of 3D printing technologies to electrochemical and optical biosensors developed for biomedical and pharmaceutical analysis. J Pharm Biomed Anal 2023; 230:115385. [PMID: 37054602 DOI: 10.1016/j.jpba.2023.115385] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/28/2023] [Accepted: 04/02/2023] [Indexed: 04/05/2023]
Abstract
Three-dimensional (3D) printing technology has been applied in many areas. In recent years, new generation biosensorshave been emerged with the progress on 3D printing technology (3DPT) . Especially in the development of optical and electrochemical biosensors, 3DPT provides many advantages such as low cost, easy to manufacturing, being disposable and allow point of care testing. In this review, recent trends in the development of 3DPT based electrochemical and optical biosensors with their applications in the field of biomedical and pharmaceutical are examined. In addition, the advantages, disadvantages and future opportunities of 3DPT are discussed.
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Klar S, Poether DC, Reinert J, Hüttig N, Linsel G, Jäckel U. Application of impedance measurement to investigate in vitro inhalation toxicity of bacteria. J Occup Med Toxicol 2021; 16:32. [PMID: 34384434 PMCID: PMC8359036 DOI: 10.1186/s12995-021-00317-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Workers of agriculture and intensive life stock farming are exposed to highly contaminated workplaces. Bioaerosol exposures are suspected to trigger respiratory health effects of the workers. So far, risk evaluation of bioaerosols has been assessed through the infectivity of comprising biological agents that is classified in Europe by four risk groups according to the criteria of Directive 2000/54EC of the European Parliament. However, this directive additionally requires the risk assessment of allergenic and toxigenic effects without further elaboration. The aim of our study was to establish an in vitro screening system that is able to measure inhalative toxic effects of bacteria and their metabolites. METHODS In this study, we analyzed three bacterial toxins and five culture supernatants of selected bacteria with known toxicity as model agents exposed to the lung epithelial cell line NuLi-1. We used electrical cell-substrate impedance sensing (ECIS) method to monitor real-time cell changes and the viability test Prestoblue™. RESULTS We confirmed concentration dependent cytotoxic effects of the selected toxins in NuLi-1 cells over a period of up to 48 h. Each toxin resulted in a different but specific impedance profile over time according to their mode of action, whereas viability assay showed the metabolic activity of the cells at a chosen time point without revealing any information on their mode of action. Furthermore, dose-response-relationships were monitored. Tested model bacteria (Streptoccous pneumoniae, Acinetobacter radioresistens, Aerococcus viridans, Aeromonas hydrophila) reacted according to their expected toxicity except one bacterium (Enterococcus faecalis). The established assays revealed the concentration dependent onset and intensity of bacterial cytotoxicity and the viability of the cells at 24 h and 48 h exposure. CONCLUSION Impedance measurement and the viability assay Prestoblue™ in combination are suitable as sensitive screening methods to analyze toxic potential of bacteria and can therefor support the risk assessment of workplaces in terms of the directive 2000/54/EC.
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Affiliation(s)
- Stefanie Klar
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany.
| | - Dierk-Christoph Poether
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany
| | - Jessica Reinert
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany
| | - Nicole Hüttig
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany
| | - Gunter Linsel
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany
| | - Udo Jäckel
- Federal Institute for Occupational Safety and Health, Nöldnerstraße 40-42, 10317, Berlin, Germany
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Ilyas AMO, Alam MK, Musah JD, Saw LO, Venkatesh S, Yeung CC, Yang M, Vellaisamy ALR, Lau C. Development of a carboxyl-terminated indium tin oxide electrode for improving cell adhesion and facilitating low noise, real-time impedance measurements. Am J Physiol Cell Physiol 2021; 320:C974-C986. [PMID: 33689477 DOI: 10.1152/ajpcell.00537.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The working electrode's surface property is crucial to cell adhesion and signal collection in electric cell-substrate impedance sensing (ECIS). To date, the indium tin oxide (ITO)-based working electrode is of interest in ECIS study due to its high transparency and biocompatibility. Of great concern is the impedance signal loss, distortion, and data interpretation conflict profoundly created by the movement of multiple cells during ECIS study. Here, a carboxyl-terminated ITO substrate was prepared by stepwise surface amino silanization, with N-hydroxy succinimide (NHS) and 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride (EDC) treatment, respectively. We investigated the stepwise changes in the property of the treated ITO, cell-substrate adhesion, collective cell mobility, and time course of change in absolute impedance from multiple Chinese hamster ovary (CHO) cells [(Δt-Δ|Z|)CELLS]. The carboxyl-terminated ITO substrate with a surface roughness of 6.37 nm shows enhanced conductivity, 75% visible light transparency, improved cell adherence, reduced collective cell migration speed by approximately twofold, and diminished signal distortion in the [(Δt-Δ|Z|)CELLS]. Thus, our study provides an ITO surface-treatment strategy to reduce multiple cell movement effects and to obtain essential cell information from the ECIS study of multiple cells through undistorted (Δt-Δ|Z|)CELLS.
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Affiliation(s)
- A M Olabisi Ilyas
- Department of Physics, City University of Hong Kong, Kowloon, Special Administrative Region of China.,Department of Physics, Federal University Oye-Ekiti, Oye-Ekiti, Nigeria
| | - Md Kowsar Alam
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Special Administrative Region of China.,Department of Physics, University of Chittagong, Chittagong, Bangladesh
| | - Jamal-Deen Musah
- State Key Laboratory of Terahertz and Millimeter Waves, Department of Material Science and Engineering, City University of Hong Kong, Kowloon, Special Administrative Region of China
| | - Lin Oo Saw
- State Key Laboratory of Terahertz and Millimeter Waves, Department of Material Science and Engineering, City University of Hong Kong, Kowloon, Special Administrative Region of China
| | - Shishir Venkatesh
- State Key Laboratory of Terahertz and Millimeter Waves, Department of Material Science and Engineering, City University of Hong Kong, Kowloon, Special Administrative Region of China
| | - Chi-Chung Yeung
- Department of Chemistry, City University of Hong Kong, Kowloon, Special Administrative Region of China
| | - Mengsu Yang
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Special Administrative Region of China
| | - A L R Vellaisamy
- James Watt School of Engineering, University of Glasgow, Glasgow, United Kingdom
| | - Condon Lau
- Department of Physics, City University of Hong Kong, Kowloon, Special Administrative Region of China
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Wei K, Sun J, Gao Q, Yang X, Ye Y, Ji J, Sun X. 3D "honeycomb" cell/carbon nanofiber/gelatin methacryloyl (GelMA) modified screen-printed electrode for electrochemical assessment of the combined toxicity of deoxynivalenol family mycotoxins. Bioelectrochemistry 2021; 139:107743. [PMID: 33524655 DOI: 10.1016/j.bioelechem.2021.107743] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/09/2021] [Accepted: 01/11/2021] [Indexed: 02/08/2023]
Abstract
A "honeycomb" electrochemical biosensor based on 3D printing was developed to noninvasively monitor the viability of 3D cells and evaluate the individual or combined toxicity of deoxynivalenol (DON), 3-acetyldeoxynivalenol (3-ADON), and 15-acetyldeoxynivalenol (15-ADON). Carbon nanofiber (CN)/gelatin methacryloyl (GelMA) conductive composite hydrogel with strong processability was printed on 8-channel screen-printed carbon electrodes (SPCEs) to maintain cell viability and form tight cell-to-cell contacts. A "3D honeycomb" printing infill pattern was selected in the construction of the biosensors to improve conductivity. Based on 3D printing technology, the electrochemical biosensor can prevent manual error and provide for high-throughput detection. Electrochemical impedance spectroscopy (EIS) was used to evaluate mycotoxin toxicity. The EIS response decreased with the concentration of DON, 3-ADON and 15-ADON in the range of 0.1-10, 0.05-100, and 0.1-10 μg/mL, respectively, with a limit of detection of 0.07, 0.10 and 0.06 μg/mL, respectively. Mycotoxin interactions were analyzed using the isobologram-combination index (CI) method. The electrochemical cytotoxicity evaluation result was confirmed by biological assays. Therefore, a novel method for evaluating the combined toxicity of mycotoxins is proposed, which exhibits potential for application to food safety and evaluation.
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Affiliation(s)
- Kaimin Wei
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Jiadi Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Qing Gao
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Xingxing Yang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yongli Ye
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Jian Ji
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Xiulan Sun
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and Quality Control, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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Maeda J, Allum AJ, Mussallem JT, Froning CE, Haskins AH, Buckner MA, Miller CD, Kato TA. Ascorbic Acid 2-Glucoside Pretreatment Protects Cells from Ionizing Radiation, UVC, and Short Wavelength of UVB. Genes (Basel) 2020; 11:genes11030238. [PMID: 32106443 PMCID: PMC7140853 DOI: 10.3390/genes11030238] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 02/15/2020] [Accepted: 02/20/2020] [Indexed: 12/21/2022] Open
Abstract
Ascorbic acid 2-glucoside (AA2G), glucosylated ascorbic acid (AA), has superior properties for bioavailability and stability compared to AA. Although AA2G has shown radioprotective properties similar to AA, effects for UV light, especially UVC and UVB, are not studied. AA2G was tested for cytotoxicity and protective effects against ionizing radiation, UVC, and broadband and narrowband UVB in Chinese hamster ovary (CHO) cells and compared to AA and dimethyl sulfoxide (DMSO). Pretreatment with DMSO, AA, and AA2G showed comparative protective effects in CHO wild type and radiosensitive xrs5 cells for cell death against ionizing radiation with reducing the number of radiation-induced DNA damages. Pretreatment with AA and AA2G protected CHO wild type and UV sensitive UV135 cells from UVC and broadband UV, but not from narrowband UVB. DMSO showed no protective effects against tested UV. The UV filtration effects of AA and AA2G were analyzed with a spectrometer and spectroradiometer. AA and AA2G blocked UVC and reduced short wavelengths of UVB, but had no effect on wavelengths above 300nm. These results suggest that AA2G protects cells from radiation by acting as a radical scavenger to reduce initial DNA damage, as well as protecting cells from certain UVB wavelengths by filtration.
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Wei M, Zhang R, Zhang F, Zhang Y, Li G, Miao R, Shao S. An Evaluation Approach of Cell Viability Based on Cell Detachment Assay in a Single-Channel Integrated Microfluidic Chip. ACS Sens 2019; 4:2654-2661. [PMID: 31502455 DOI: 10.1021/acssensors.9b01061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Due to the heterogeneity of cancer cell populations, the traditional evaluation approach of cell viability based on the cell counting assay is quite inaccurate for the dose-response test of anticancer drugs, cell toxicology assays, and other biochemical stimulations. In this paper, an evaluation approach of cell viability based on the cell detachment assay in a single-channel integrated microfluidic chip is proposed to improve the accuracy of cell viability assessment. The electrodes are coated by fibronectin for specific cell adhesion, and it is biologically significant to study the cell detachment assay in vitro. The maximum number of cells that can be detected by this sensor is about 105 cells (overgrowing), while the minimum is about 100 cells. This method is calibrated with the half-maximal inhibitory concentration assay, and the results show that the cell viability calculated by adhesion strength is more accurate than that evaluated using the cell counting assay. Meanwhile, the shear rate is transformed into shear stress for the comparability among the results in other papers. The most sensitive frequency is also determined as 1 kHz according to normalized impedance. Besides, the impedance of cell adhesion affected by different shear stresses is monitored to study the optimized plan for long-term culture of cells in the integrated microfluidic chip prepared for the cell detachment assay. Adhesion strength τ25, which is the magnitude of shear stress needed to detach 75% of cell population, is introduced to describe the cell adhesion forces. It is calculated and normalized based on the cell detachment assay to evaluate cell viability. The relative errors of the cell detachment method compared with those of the cell counting method decrease by 0.637 (0% FBS), 0.586 (0.5% FBS), and 0.342 (2% FBS).
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Abad Tan S, Zoidl G, Ghafar-Zadeh E. A Multidisciplinary Approach Toward High Throughput Label-Free Cytotoxicity Monitoring of Superparamagnetic Iron Oxide Nanoparticles. Bioengineering (Basel) 2019; 6:E52. [PMID: 31185664 PMCID: PMC6631604 DOI: 10.3390/bioengineering6020052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/24/2019] [Accepted: 06/05/2019] [Indexed: 12/12/2022] Open
Abstract
Abstract: This paper focuses on cytotoxicity examination of superparamagnetic iron oxide nanoparticles (SPIONs) using different methods, including impedance spectroscopy. Recent advances of SPIONs for clinical and research applications have triggered the need to understand their effects in cells. Despite the great advances in adapting various biological and chemical methods to assess in-vitro toxicity of SPIONs, less attention has been paid on the development of a high throughput label-free screening platform to study the interaction between the cells and nanoparticles including SPIONs. In this paper, we have taken the first step toward this goal by proposing a label-free impedimetric method for monitoring living cells treated with SPIONs. We demonstrate the effect of SPIONs on the adhesion, growth, proliferation, and viability of neuroblastoma 2A (N2a) cells using impedance spectroscopy as a label-free method, along with other standard microscopic and cell viability testing methods as control methods. Our results have shown a decreased viability of the cells as the concentration of SPIONs increases with percentages of 59%, 47%, and 40% for 100 µg/mL (C4), 200 µg/mL (C5), 300 µg/mL (C6), respectively. Although all SPIONs concentrations have allowed the growth of cells within 72 hours, C4, C5, and C6 showed slower growth compared to the control (C1). The growth and proliferation of N2a cells are faster in the absence or low concentration of SPIONS. The percent coefficient of variation (% CV) was used to compare cell concentrations obtained by TBDE assay and a Scepter cell counter. Results also showed that the lower the SPIONs concentration, the lower the impedance is expected to be in the sensing electrodes without the cells. Meanwhile, the variation of surface area (∆S) was affected by the concentration of SPIONs. It was observed that the double layer capacitance was almost constant because of the higher attachment of cells, the lower surface area coated by SPIONs. In conclusion, impedance changes of electrodes exposed to the mixture of cells and SPIONs offer a wide dynamic range (>1 MΩ using Electric Cell-substrate Impedance electrodes) suitable for cytotoxicity studies. Based on impedance based, viability testing and microscopic methods' results, SPIONs concentrations higher than 100 ug/mL and 300 ug/mL cause minor and major effects, respectively. We propose that a high throughput impedance-based label-free platform provides great advantages for studying SPIONs in a cell-based context, opening a window of opportunity to design and test the next generation of SPIONs with reduced toxicity for biomedical or medical applications.
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Affiliation(s)
- Sonia Abad Tan
- Biologically Inspired Sensors and Actuators Laboratory, Lassonde School of Engineering, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
| | - Georg Zoidl
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Psychology, York University, Ontario, Toronto M3J 1P3, Canada.
| | - Ebrahim Ghafar-Zadeh
- Biologically Inspired Sensors and Actuators Laboratory, Lassonde School of Engineering, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Electrical Engineering and Computer Science, York University, Ontario, Toronto M3J 1P3, Canada.
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Valavade AV, Date KS, Press MR, Kothari DC. Scanning Dielectric Constant Microscopy for imaging single biological cells. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aada1c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Martinez J, Montalibet A, McAdams E, Faivre M, Ferrigno R. Effect of electrode material on the sensitivity of interdigitated electrodes used for Electrical Cell-Substrate Impedance Sensing technology. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2018; 2017:813-816. [PMID: 29059996 DOI: 10.1109/embc.2017.8036948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This study explores the effect of the electrode material on the sensitivity of interdigitated electrodes (IDEs) used in Electrical Cell-Substrate Impedance Sensing (ECIS) technology. This technique is a label-free method to evaluate cellular activity of adherent cells. IDEs of gold (Au), indium tin oxide (ITO) and ITO functionalized with iridium oxide (IrOx) were characterized with impedance spectroscopy and their interfacial impedances were evaluated in potassium chloride (KCl) solutions. In parallel, ECIS measurements were performed on these three electrode materials during the proliferation of the human breast cancer cell line, MCF-7. The results indicate that the difference in sensitivity to MCF-7 of the three materials might be strongly correlated to their interfacial impedances. We found that ITO electrodes coated with IrOx show slightly higher sensitivity to MCF-7 breast cancer cells while still offering transparency compared to gold, which is considered the conventional material in ECIS devices.
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Stubbe M, Gimsa J. Furthering the state of knowledge on the electric properties of hemi-ellipsoidal single cells and cell patches on electrodes. Biosens Bioelectron 2018; 105:166-172. [PMID: 29412941 DOI: 10.1016/j.bios.2018.01.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/10/2018] [Accepted: 01/19/2018] [Indexed: 01/09/2023]
Abstract
The impedance of electrodes with adherent biological cells correlates with cell viability and proliferation. To model this correlation, we exploited the idea that the introduction of a highly conductive layer into the equatorial equipotential slice of a system with an oriented, freely suspended, single ellipsoidal cell may split the system into mirror-symmetrical halves without changing the field distribution. Each half possesses half of the system's impedance and contains a hemiellipsoidal cell attached to the conductive layer, which can be considered a bottom electrode. For a hemiellipsoidal adherent cell model (ACM) with standard electrical properties for the external and cellular media, the assumption of a bottom membrane and a subcellular cleft in the 100 nm range, as found in adherent cells, changed the potential distribution over a one-% range up to frequencies of 1 MHz. For simplicity, potential distributions for slices of spheroidal objects can be numerically calculated in 2D. The 2D distributions can be converted into three dimensions using simplified equations for the influential radii of spheroids. After the ACM approach was expanded to adherent cell patch models (APMs), the feasibility of our model modifications was tested using two criteria: the constancy of the equipotential plane touching the poles of ACMs or APMs and a comparison of the impedance, which could be numerically calculated from the overall current between the bottom electrode and a plane-parallel counter-electrode, with the impedance of the suspension obtained from Maxwell-Wagner's mixing equation applied to hemiellipsoidal cells.
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Affiliation(s)
- Marco Stubbe
- University of Rostock, Department of Biophysics, Gertrudenstr. 11a, 18057 Rostock, Germany
| | - Jan Gimsa
- University of Rostock, Department of Biophysics, Gertrudenstr. 11a, 18057 Rostock, Germany.
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Shi T, Li L, Zhou G, Wang C, Chen X, Zhang R, Xu J, Lu X, Jiang H, Chen J. Toll-like receptor 5 agonist CBLB502 induces radioprotective effects in vitro. Acta Biochim Biophys Sin (Shanghai) 2018; 49:487-495. [PMID: 28407032 DOI: 10.1093/abbs/gmx034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 12/31/2022] Open
Abstract
CBLB502 derived from Salmonella flagellin is a novel agonist of Toll-like receptor 5 (TLR5). It has been shown that CBLB502 can exert high radioprotective efficacy on mice and primates from both GI and hematopoietic syndromes during whole-body irradiation with low toxicity and immunogenicity. However, no effective system has been used to investigate the protective effect of CBLB502 against irradiation and the related mechanism in vitro. In this study, we investigated the radioprotective properties of CBLB502 in HEK293-N-T cells constitutively expressing human TLR5 and NF-κB-dependent luciferase. HEK293-N-T cells were treated with different doses of CBLB502 prior to 60Co-γ ray irradiation. After irradiation, cell viability was real-time measured for 4 days by using the real-time cell analysis system. We found that CBLB502 was capable of efficiently maintaining the survival rate of irradiated HEK293-N-T cells. Then apoptotic cell death and cell cycle were detected by flow cytometry. The results showed that CBLB502 pre-treatment could reduce the apoptosis and promote the recovery of irradiated HEK293-N-T cells from G2-phase arrest in a dose-dependent manner. Our data indicated that CBLB502 has a direct radioprotective effect in vitro via anti-apoptosis and promotes cell cycle recovery. The method developed here could be an effective in vitro system to screen other TLR5-target radioprotectants like CBLB502.
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Affiliation(s)
- Tong Shi
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | | | - Guochao Zhou
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Chen Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Xuejun Chen
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Ruihua Zhang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Jianfu Xu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Xiaojing Lu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Hui Jiang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Jisheng Chen
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
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Xia S, Zhu P, Pi F, Zhang Y, Li Y, Wang J, Sun X. Development of a simple and convenient cell-based electrochemical biosensor for evaluating the individual and combined toxicity of DON, ZEN, and AFB 1. Biosens Bioelectron 2017. [DOI: 10.1016/j.bios.2017.06.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Teng S, Tebby C, Barcellini-Couget S, De Sousa G, Brochot C, Rahmani R, Pery ARR. Analysis of real-time mixture cytotoxicity data following repeated exposure using BK/TD models. Toxicol Appl Pharmacol 2016; 305:118-126. [PMID: 27317371 DOI: 10.1016/j.taap.2016.06.018] [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: 03/10/2016] [Revised: 06/06/2016] [Accepted: 06/13/2016] [Indexed: 11/23/2022]
Abstract
Cosmetic products generally consist of multiple ingredients. Thus, cosmetic risk assessment has to deal with mixture toxicity on a long-term scale which means it has to be assessed in the context of repeated exposure. Given that animal testing has been banned for cosmetics risk assessment, in vitro assays allowing long-term repeated exposure and adapted for in vitro - in vivo extrapolation need to be developed. However, most in vitro tests only assess short-term effects and consider static endpoints which hinder extrapolation to realistic human exposure scenarios where concentration in target organs is varies over time. Thanks to impedance metrics, real-time cell viability monitoring for repeated exposure has become possible. We recently constructed biokinetic/toxicodynamic models (BK/TD) to analyze such data (Teng et al., 2015) for three hepatotoxic cosmetic ingredients: coumarin, isoeugenol and benzophenone-2. In the present study, we aim to apply these models to analyze the dynamics of mixture impedance data using the concepts of concentration addition and independent action. Metabolic interactions between the mixture components were investigated, characterized and implemented in the models, as they impacted the actual cellular exposure. Indeed, cellular metabolism following mixture exposure induced a quick disappearance of the compounds from the exposure system. We showed that isoeugenol substantially decreased the metabolism of benzophenone-2, reducing the disappearance of this compound and enhancing its in vitro toxicity. Apart from this metabolic interaction, no mixtures showed any interaction, and all binary mixtures were successfully modeled by at least one model based on exposure to the individual compounds.
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Affiliation(s)
- S Teng
- Models for Toxicology and Ecotoxicology Unit, INERIS, Parc Technologique Alata, BP 2, 60550 Verneuil-en-Halatte, France
| | - C Tebby
- Models for Toxicology and Ecotoxicology Unit, INERIS, Parc Technologique Alata, BP 2, 60550 Verneuil-en-Halatte, France
| | - S Barcellini-Couget
- ODESIA Neosciences, Sophia Antipolis, 400 route des chappes, 06903 Sophia Antipolis, France
| | - G De Sousa
- INRA, ToxAlim, 400 route des Chappes, BP, 167 06903 Sophia Antipolis, Cedex, France
| | - C Brochot
- Models for Toxicology and Ecotoxicology Unit, INERIS, Parc Technologique Alata, BP 2, 60550 Verneuil-en-Halatte, France
| | - R Rahmani
- INRA, ToxAlim, 400 route des Chappes, BP, 167 06903 Sophia Antipolis, Cedex, France
| | - A R R Pery
- AgroParisTech, UMR 1402 INRA-AgroParisTech Ecosys, 78850 Thiverval Grignon, France; INRA, UMR 1402 INRA-AgroParisTech Ecosys, 78850 Thiverval Grignon, France.
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15
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Collins AR, Annangi B, Rubio L, Marcos R, Dorn M, Merker C, Estrela-Lopis I, Cimpan MR, Ibrahim M, Cimpan E, Ostermann M, Sauter A, Yamani NE, Shaposhnikov S, Chevillard S, Paget V, Grall R, Delic J, de-Cerio FG, Suarez-Merino B, Fessard V, Hogeveen KN, Fjellsbø LM, Pran ER, Brzicova T, Topinka J, Silva MJ, Leite PE, Ribeiro AR, Granjeiro JM, Grafström R, Prina-Mello A, Dusinska M. High throughput toxicity screening and intracellular detection of nanomaterials. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2016; 9. [PMID: 27273980 PMCID: PMC5215403 DOI: 10.1002/wnan.1413] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 04/08/2016] [Accepted: 04/12/2016] [Indexed: 12/25/2022]
Abstract
With the growing numbers of nanomaterials (NMs), there is a great demand for rapid and reliable ways of testing NM safety—preferably using in vitro approaches, to avoid the ethical dilemmas associated with animal research. Data are needed for developing intelligent testing strategies for risk assessment of NMs, based on grouping and read‐across approaches. The adoption of high throughput screening (HTS) and high content analysis (HCA) for NM toxicity testing allows the testing of numerous materials at different concentrations and on different types of cells, reduces the effect of inter‐experimental variation, and makes substantial savings in time and cost. HTS/HCA approaches facilitate the classification of key biological indicators of NM‐cell interactions. Validation of in vitroHTS tests is required, taking account of relevance to in vivo results. HTS/HCA approaches are needed to assess dose‐ and time‐dependent toxicity, allowing prediction of in vivo adverse effects. Several HTS/HCA methods are being validated and applied for NM testing in the FP7 project NANoREG, including Label‐free cellular screening of NM uptake, HCA, High throughput flow cytometry, Impedance‐based monitoring, Multiplex analysis of secreted products, and genotoxicity methods—namely High throughput comet assay, High throughput in vitro micronucleus assay, and γH2AX assay. There are several technical challenges with HTS/HCA for NM testing, as toxicity screening needs to be coupled with characterization of NMs in exposure medium prior to the test; possible interference of NMs with HTS/HCA techniques is another concern. Advantages and challenges of HTS/HCA approaches in NM safety are discussed. WIREs Nanomed Nanobiotechnol 2017, 9:e1413. doi: 10.1002/wnan.1413 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Andrew R Collins
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway
| | | | - Laura Rubio
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Ricard Marcos
- Grup de Mutagènesi, Departament de Genètica i de Microbiologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Bellaterra, Spain.,CIBER Epidemiología y Salud Pública, ISCIII, Spain
| | - Marco Dorn
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Carolin Merker
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Irina Estrela-Lopis
- Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany
| | - Mihaela Roxana Cimpan
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Mohamed Ibrahim
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Emil Cimpan
- Department of Electrical Engineering, Faculty of Engineering, Bergen University College, Norway
| | - Melanie Ostermann
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Alexander Sauter
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
| | - Naouale El Yamani
- Comet Biotech AS, and Department of Nutrition, University of Oslo, Norway.,Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | | | - Sylvie Chevillard
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Vincent Paget
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Romain Grall
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | - Jozo Delic
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA) Direction des Sciences du Vivant, Institut de Radiobiologie Cellulaire et Moléculaire, Service de Radiobiologie Expérimentale et d'Innovation Technologique, Laboratoire de Cancérologie Expérimentale, Fontenay-aux-Roses cedex, France
| | | | | | - Valérie Fessard
- ANSES Fougères Laboratory, Contaminant Toxicology Unit, France
| | | | - Lise Maria Fjellsbø
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Elise Runden Pran
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
| | - Tana Brzicova
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Jan Topinka
- Institute of Experimental Medicine AS CR, Prague, Czech Republic
| | - Maria João Silva
- Human Genetics Department, National Institute of Health Doutor Ricardo Jorge and Centre for Toxicogenomics and Human Health, NMS/FCM, UNL, Lisbon, Portugal
| | - P E Leite
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - A R Ribeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - J M Granjeiro
- Directory of Life Sciences Applied Metrology, National Institute of Metrology Quality and Technology, Rio de Janeiro, Brazil
| | - Roland Grafström
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Adriele Prina-Mello
- Nanomedicine Group, Trinity Centre for Health Sciences, Trinity College Dublin, Dublin, Ireland
| | - Maria Dusinska
- Health Effects Group, Department of Environmental Chemistry, NILU- Norwegian Institute for Air Research, Kjeller, Norway
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16
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Teng S, Barcellini-Couget S, Beaudouin R, Brochot C, Desousa G, Rahmani R, Pery A. BK/TD models for analyzing in vitro impedance data on cytotoxicity. Toxicol Lett 2015; 235:96-106. [DOI: 10.1016/j.toxlet.2015.03.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/24/2015] [Accepted: 03/27/2015] [Indexed: 02/01/2023]
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17
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Caviglia C, Zór K, Canepa S, Carminati M, Larsen LB, Raiteri R, Andresen TL, Heiskanen A, Emnéus J. Interdependence of initial cell density, drug concentration and exposure time revealed by real-time impedance spectroscopic cytotoxicity assay. Analyst 2015; 140:3623-9. [PMID: 25868456 DOI: 10.1039/c5an00097a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated the combined effect of the initial cell density (12,500, 35,000, 75,000, and 100,000 cells cm(-2)) and concentration of the anti-cancer drug doxorubicin on HeLa cells by performing time-dependent cytotoxicity assays using real-time electrochemical impedance spectroscopy. A correlation between the rate of cell death and the initial cell seeding density was found at 2.5 μM doxorubicin concentration, whereas this was not observed at 5 or 100 μM. By sensing the changes in the cell-substrate interaction using impedance spectroscopy under static conditions, the onset of cytotoxicity was observed 5 h earlier than when using a standard colorimetric end-point assay (MTS) which measures changes in the mitochondrial metabolism. Furthermore, with the MTS assay no cytotoxicity was observed after 15 h of incubation with 2.5 μM doxorubicin, whereas the impedance showed at this time point cell viability that was below 25%. These results indicate that impedance detection reveals cytotoxic events undetectable when using the MTS assay, highlighting the importance of combining impedance detection with traditional drug toxicity assays towards a more in depth understanding of the effect of anti-cancer drugs on in vitro assays. Moreover, the detection of doxorubicin induced toxicity determined with impedance under static conditions proved to be 6 times faster than in perfusion culture.
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Affiliation(s)
- C Caviglia
- Department of Micro- and Nanotechnology, Technical University of Denmark, Kgs. Lyngby, Denmark.
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18
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Özel RE, Liu X, Alkasir RS, Andreescu S. Electrochemical methods for nanotoxicity assessment. Trends Analyt Chem 2014. [DOI: 10.1016/j.trac.2014.04.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Liu Q, Lu Y, Wang H, Zhou J, Zhang Y, Chen Q, Luo S, Li R, Wang P. Impedance Detection and Modeling of Chemotherapeutic Agents by a Cancer Cell-Based Biosensor. ANAL LETT 2014. [DOI: 10.1080/00032719.2013.867498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Pradhan R, Rajput S, Mandal M, Mitra A, Das S. Frequency dependent impedimetric cytotoxic evaluation of anticancer drug on breast cancer cell. Biosens Bioelectron 2014; 55:44-50. [DOI: 10.1016/j.bios.2013.11.060] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 11/08/2013] [Accepted: 11/20/2013] [Indexed: 11/27/2022]
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21
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Gu W, Zhao Y. Cellular electrical impedance spectroscopy: an emerging technology of microscale biosensors. Expert Rev Med Devices 2014; 7:767-79. [DOI: 10.1586/erd.10.47] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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22
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Primiceri E, Chiriacò MS, Rinaldi R, Maruccio G. Cell chips as new tools for cell biology--results, perspectives and opportunities. LAB ON A CHIP 2013; 13:3789-802. [PMID: 23912640 DOI: 10.1039/c3lc50550b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Cell culture technologies were initially developed as research tools for studying cell functions, but nowadays they are essential for the biotechnology industry, with rapidly expanding applications requiring more and more advancements with respect to traditional tools. Miniaturization and integration of sensors and microfluidic components with cell culture techniques open the way to the development of cellomics as a new field of research targeting innovative analytic platforms for high-throughput studies. This approach enables advanced cell studies under controllable conditions by providing inexpensive, easy-to-operate devices. Thanks to their numerous advantages cell-chips have become a hotspot in biosensors and bioelectronics fields and have been applied to very different fields. In this review exemplary applications will be discussed, for cell counting and detection, cytotoxicity assays, migration assays and stem cell studies.
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Affiliation(s)
- Elisabetta Primiceri
- CNR Istituto Nanoscienze - NNL and Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, Lecce, Italy.
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23
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Yang X, Kirsch J, Simonian A. Campylobacter spp. detection in the 21st century: a review of the recent achievements in biosensor development. J Microbiol Methods 2013; 95:48-56. [PMID: 23830967 DOI: 10.1016/j.mimet.2013.06.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 04/18/2013] [Accepted: 06/10/2013] [Indexed: 10/26/2022]
Abstract
Campylobacter spp. are an important cause of acute bacterial diseases in humans worldwide. Many bacterial species in the Campylobacter genus are considered harmful and may cause several infectious diseases. Currently, there are no commercial biosensors available to detect Campylobacter spp. in food matrices, and little to no testing has been done in research laboratories with actual food matrices. Biosensors potentially provide a powerful means to detect Campylobacter spp. with the advantages of high sensitivity (low limits of detection with a high signal to noise ratio), high specificity (able to selectively detect the target among several similar targets), real time sensing, and in-site monitoring. This review summarizes the latest research in biosensing technologies for detection of Campylobacter spp. based on a variety of transducers and recognition elements. Finally, a comparison is made among all recently reported biosensors for the detection of Campylobacter spp.
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Affiliation(s)
- Xiaoyun Yang
- Department of Materials Engineering, Auburn University, AL 36849, USA
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24
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Development of a novel electrochemical sensor using pheochromocytoma cells and its assessment of acrylamide cytotoxicity. Biosens Bioelectron 2013; 44:122-6. [DOI: 10.1016/j.bios.2013.01.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 01/15/2013] [Accepted: 01/15/2013] [Indexed: 11/22/2022]
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25
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Heileman K, Daoud J, Tabrizian M. Dielectric spectroscopy as a viable biosensing tool for cell and tissue characterization and analysis. Biosens Bioelectron 2013; 49:348-59. [PMID: 23796534 DOI: 10.1016/j.bios.2013.04.017] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Accepted: 04/16/2013] [Indexed: 01/03/2023]
Abstract
The use of dielectric spectroscopy to carry out real time observations of cells and to extract a wealth of information about their physiological properties has expanded in recent years. This popularity is due to the simple, easy to use, non-invasive and real time nature of dielectric spectroscopy. The ease of integrating dielectric spectroscopy with microfluidic devices has allowed the technology to further expand into biomedical research. Dielectric spectra are obtained by applying an electrical signal to cells, which is swept over a frequency range. This review covers the different methods of interpreting dielectric spectra and progress made in applications of impedance spectroscopy for cell observations. First, methods of obtaining specific electrical properties of cells (cell membrane capacitance and cytoplasm conductivity) are discussed. These electrical properties are obtained by fitting the dielectric spectra to different models and equations. Integrating models to reduce the effects of the electrical double layer are subsequently covered. Impedance platforms are then discussed including electrical cell substrate impedance sensing (ECIS). Categories of ECIS systems are divided into microelectrode arrays, interdigitated electrodes and those that allow differential ECIS measurements. Platforms that allow single cell and sub-single cell measurements are then discussed. Finally, applications of impedance spectroscopy in a range of cell observations are elaborated. These applications include observing cell differentiation, mitosis and the cell cycle and cytotoxicity/cell death. Future applications such as drug screening and in point of care applications are then covered.
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Affiliation(s)
- Khalil Heileman
- Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, Quebec, Canada.
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26
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Cimpan MR, Mordal T, Schölermann J, Allouni ZE, Pliquett U, Cimpan E. An impedance-based high-throughput method for evaluating the cytotoxicity of nanoparticles. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Uboldi C, Giudetti G, Broggi F, Gilliland D, Ponti J, Rossi F. Amorphous silica nanoparticles do not induce cytotoxicity, cell transformation or genotoxicity in Balb/3T3 mouse fibroblasts. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2012; 745:11-20. [DOI: 10.1016/j.mrgentox.2011.10.010] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Accepted: 10/22/2011] [Indexed: 10/15/2022]
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28
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Asphahani F, Thein M, Wang K, Wood D, Wong SS, Xu J, Zhang M. Real-time characterization of cytotoxicity using single-cell impedance monitoring. Analyst 2012; 137:3011-9. [PMID: 22498491 DOI: 10.1039/c2an16079j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cellular impedance sensors have attracted great attention as a powerful characterization tool for real-time, label-free detection of cytotoxic agents. However, impedance measurements with conventional cell-based sensors that host multiple cells on a single electrode neither provide optimal cell signal sensitivity nor are capable of recording individual cell responses. Here we use a single-cell based platform to monitor cellular impedance on planar microelectrodes to characterize cellular death. In this study, individual cells were selectively patterned on microelectrodes with each hosting one live cell through ligand-mediated natural cell adhesion. Changes in cellular morphology and cell-electrode adherence were monitored after the patterned cells were treated with varying concentrations of hydrogen peroxide, sodium arsenite, and disodium hydrogen arsenate, three potent toxicants related to neurotoxicity and oxidative stress. At low toxicant concentrations, impedance waveforms acquired from individual cells showed variable responses. A time- and concentration-dependent response was seen in the averaged single-cell impedance waveform for all three toxicants. The apoptosis and necrosis characterizations were performed to validate cell impedance results. Furthermore, time constants of apoptosis and necrosis in response to toxicant exposure were analytically established using an equivalent circuit model that characterized the mechanisms of cell death.
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Affiliation(s)
- Fareid Asphahani
- Department of Materials Science & Engineering, University of Washington, Seattle, Washington 98195-2120, USA
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29
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Di Capua R, Barra M, Santoro F, Viggiano D, Ambrosino P, Soldovieri MV, Taglialatela M, Tagliatela M, Cassinese A. Towards the realization of label-free biosensors through impedance spectroscopy integrated with IDES technology. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2012; 41:249-56. [PMID: 22237602 DOI: 10.1007/s00249-011-0782-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Revised: 12/08/2011] [Accepted: 12/12/2011] [Indexed: 11/28/2022]
Abstract
Impedance spectroscopy (IS) is a powerful technique for analysis of the complex electrical impedance of a large variety of biological systems, because it is sensitive both to surface phenomena and to changes of bulk properties. A simple and convenient method of analysis of cell properties by IS is described. An interdigitated electrodes configuration was used for the measurements; human epithelial cells were grown on the device to investigate the complex dielectric response as a function of frequency, in order to test the suitability of the device for use as a label-free biosensor. To test the ability of the device to detect channels in the cell membrane, the effect of drugs known to affect membrane integrity was also investigated. The frequency response of the admittance (i.e. the reciprocal of the impedance) can be well fitted by a model based on very simple assumptions about the cells coating the device surface and the current flow; from the calculations, membrane-specific capacitance and information about cell adhesion can be inferred. These preliminary efforts have shown that our configuration could lead to a label-free non-invasive technique for biosensing and cellular behavior monitoring which might prove useful in investigation of the basic properties of cells and the effect of drugs by estimation of some fundamental properties and modification of the electrical characteristics of the device.
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Affiliation(s)
- R Di Capua
- Health Sciences Department, University of Molise, Campobasso, Italy.
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30
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Gáspár S, David S, Polonschii C, Marcu I, Gheorghiu M, Gheorghiu E. Simultaneous impedimetric and amperometric interrogation of renal cells exposed to a calculus-forming salt. Anal Chim Acta 2011; 713:115-20. [PMID: 22200317 DOI: 10.1016/j.aca.2011.11.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 11/09/2011] [Accepted: 11/10/2011] [Indexed: 11/30/2022]
Abstract
The complexity of the cellular response, induced even by the simplest experimental stimulus, requires an increased number of cellular parameters to be simultaneously monitored. An all electrochemical system allowing the simultaneous and real-time monitoring of both cell adherence and superoxide release into the extracellular space was developed to address this challenge. Cell adherence (to neighboring cells and to substrate) was monitored using non-faradaic impedance spectroscopy while the superoxide release was monitored using a cytochrome c-based amperometric biosensor. The system was used to observe for the first time how these two cellular parameters are changing in real-time for renal cells exposed to calcium oxalate, a calculus-forming salt. It was discovered that calcium oxalate crystals decrease cell adherence and in the same time induce oxidative stress by an overproduction of superoxide. Subconfluent cells, without fully developed tight junctions, appear to be more vulnerable than confluent cells with tight junctions indicating the important protective role of these junctions.
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Affiliation(s)
- Szilveszter Gáspár
- International Centre of Biodynamics, 1B Intrarea Portocalelor Street, 060101 Bucharest, Romania.
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31
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Wissenwasser J, Vellekoop MJ, Kapferer W, Lepperdinger G, Heer R. Multifrequency impedance measurement technique for wireless characterization of microbiological cell cultures. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:115110. [PMID: 22129016 DOI: 10.1063/1.3664614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An impedance measurement system with probe signal frequencies up to 50 kHz with AC-probe voltages below 30 mV rms was integrated for wireless and battery-free monitoring of microbiological cell cultures. The here presented modular design and the use of state-of-the-art components greatly eases adoptions to a wide range of biotechnological applications without the need of bulky LCR-meters or potentiostats. The device had a power consumption of less than 2.5 mA at a 3.3 V single power supply and worked trouble-free within the humid environment of a cell culture incubator. Measurements on lumped RC-elements showed an error of less than 1% for absolute values and less than 1° regarding the phase of the complex impedance. The performance of sensor devices with interdigitated electrode structures for the measurement of adherent cell cultures was tested in the presence of phosphate-buffered saline solution in the humid atmosphere of an incubator for biological cell cultures.
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Affiliation(s)
- J Wissenwasser
- Nano-Systems, AIT Austrian Institute of Technology GmbH, 1220 Wien, Austria
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32
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Wu J, Park JP, Dooley K, Cropek DM, West AC, Banta S. Rapid development of new protein biosensors utilizing peptides obtained via phage display. PLoS One 2011; 6:e24948. [PMID: 22003385 PMCID: PMC3189179 DOI: 10.1371/journal.pone.0024948] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 08/24/2011] [Indexed: 01/20/2023] Open
Abstract
There is a consistent demand for new biosensors for the detection of protein targets, and a systematic method for the rapid development of new sensors is needed. Here we present a platform where short unstructured peptides that bind to a desired target are selected using M13 phage display. The selected peptides are then chemically synthesized and immobilized on gold, allowing for detection of the target using electrochemical techniques such as electrochemical impedance spectroscopy (EIS). A quartz crystal microbalance (QCM) is also used as a diagnostic tool during biosensor development. We demonstrate the utility of this approach by creating a novel peptide-based electrochemical biosensor for the enzyme alanine aminotransferase (ALT), a well-known biomarker of hepatotoxicity. Biopanning of the M13 phage display library over immobilized ALT, led to the rapid identification of a new peptide (ALT5-8) with an amino acid sequence of WHWRNPDFWYLK. Phage particles expressing this peptide exhibited nanomolar affinity for immobilized ALT (K(d,app) = 85±20 nM). The newly identified ALT5-8 peptide was then chemically synthesized with a C-terminal cysteine for gold immobilization. The performance of the gold-immobilized peptides was studied with cyclic voltammetry (CV), QCM, and EIS. Using QCM, the sensitivity for ALT detection was 8.9±0.9 Hz/(µg/mL) and the limit of detection (LOD) was 60 ng/mL. Using EIS measurements, the sensitivity was 142±12 impedance percentage change %/(µg/mL) and the LOD was 92 ng/mL. In both cases, the LOD was below the typical concentration of ALT in human blood. Although both QCM and EIS produced similar LODs, EIS is preferable due to a larger linear dynamic range. Using QCM, the immobilized peptide exhibited a nanomolar dissociation constant for ALT (K(d) = 20.1±0.6 nM). These results demonstrate a simple and rapid platform for developing and assessing the performance of sensitive, peptide-based biosensors for new protein targets.
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Affiliation(s)
- Jun Wu
- Department of Chemical Engineering, Columbia University, New York, New York, United States of America
| | - Jong Pil Park
- Department of Chemical Engineering, Columbia University, New York, New York, United States of America
| | - Kevin Dooley
- Department of Chemical Engineering, Columbia University, New York, New York, United States of America
| | - Donald M. Cropek
- United States Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL), Champaign, Illinois, United States of America
| | - Alan C. West
- Department of Chemical Engineering, Columbia University, New York, New York, United States of America
| | - Scott Banta
- Department of Chemical Engineering, Columbia University, New York, New York, United States of America
- * E-mail:
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Mao S, Dong X, Fu F, Seese RR, Wang Z. Estimation of postmortem interval using an electric impedance spectroscopy technique: A preliminary study. Sci Justice 2011; 51:135-8. [DOI: 10.1016/j.scijus.2010.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 09/01/2010] [Accepted: 11/11/2010] [Indexed: 11/28/2022]
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Gou HL, Zhang XB, Bao N, Xu JJ, Xia XH, Chen HY. Label-free electrical discrimination of cells at normal, apoptotic and necrotic status with a microfluidic device. J Chromatogr A 2011; 1218:5725-9. [DOI: 10.1016/j.chroma.2011.06.102] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 06/21/2011] [Accepted: 06/26/2011] [Indexed: 01/12/2023]
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35
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Justice C, Brix A, Freimark D, Kraume M, Pfromm P, Eichenmueller B, Czermak P. Process control in cell culture technology using dielectric spectroscopy. Biotechnol Adv 2011; 29:391-401. [DOI: 10.1016/j.biotechadv.2011.03.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2010] [Revised: 03/04/2011] [Accepted: 03/06/2011] [Indexed: 10/18/2022]
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36
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Heer R, Wissenwasser J, Milnera M, Farmer L, Hopfner C, Vellekoop M. Wireless powered electronic sensors for biological applications. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2011; 2010:700-3. [PMID: 21095667 DOI: 10.1109/iembs.2010.5626184] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Radio frequency identification technology is used to power a novel platform of sensor devices. The employed energy harvesting system of the individual sensors enables a blanking of the radio frequency field for a defined period, while supplying the sensor electronics with a highly stable voltage. This guarantees interference free operation of the electronic circuitry during measurements. The implementation of this principle is demonstrated for a sensor system which is based on insets for state-of-the-art micro-titer-plates. Each inset is carrying electronic circuitry and an interdigitated electrode system which is acting as sensor for recording alterations of the cell metabolism. The presented sensor devices work without batteries and are designed for impedance measurements on microbiological cell cultures under physiological relevant conditions.
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Affiliation(s)
- R Heer
- AIT Austrian Institute of Technology GmbH, Donau-City-Straβe 1, 1220 Wien, Austria.
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37
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Mao S, Fu F, Dong X, Wang Z. Supplementary Pathway for Vitality of Wounds and Wound Age Estimation in Bruises Using the Electric Impedance Spectroscopy Technique. J Forensic Sci 2011; 56:925-9. [DOI: 10.1111/j.1556-4029.2011.01756.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Yu H, Wang J, Liu Q, Zhang W, Cai H, Wang P. High spatial resolution impedance measurement of EIS sensors for light addressable cell adhesion monitoring. Biosens Bioelectron 2011; 26:2822-7. [DOI: 10.1016/j.bios.2010.08.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 08/02/2010] [Accepted: 08/12/2010] [Indexed: 11/27/2022]
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39
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Wu J, Cropek DM, West AC, Banta S. Development of a Troponin I Biosensor Using a Peptide Obtained through Phage Display. Anal Chem 2010; 82:8235-43. [DOI: 10.1021/ac101657h] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jun Wu
- Department of Chemical Engineering, Columbia University, New York, New York, and U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL), Champaign, Illinois
| | - Donald M. Cropek
- Department of Chemical Engineering, Columbia University, New York, New York, and U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL), Champaign, Illinois
| | - Alan C. West
- Department of Chemical Engineering, Columbia University, New York, New York, and U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL), Champaign, Illinois
| | - Scott Banta
- Department of Chemical Engineering, Columbia University, New York, New York, and U.S. Army Engineer Research and Development Center, Construction Engineering Research Laboratory (CERL), Champaign, Illinois
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40
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Electric cell-substrate impedance sensing (ECIS) based real-time measurement of titer dependent cytotoxicity induced by adenoviral vectors in an IPI-2I cell culture model. Biosens Bioelectron 2010; 26:2000-5. [PMID: 20875729 DOI: 10.1016/j.bios.2010.08.075] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Revised: 08/03/2010] [Accepted: 08/28/2010] [Indexed: 11/20/2022]
Abstract
Recombinant viral vectors are widespread tools for transfer of genetic material in various modern biotechnological applications like for example RNA interference (RNAi). However, an accurate and reproducible titer assignment represents the basic step for most downstream applications regarding a precise multiplicity of infection (MOI) adjustment. As necessary scaffold for the studies described in this work we introduce a quantitative real-time PCR (qPCR) based approach for viral particle measurement. Still an implicated problem concerning physiological effects is that the appliance of viral vectors is often attended by toxic effects on the individual target. To determine the critical viral dose leading to cell death we developed an electric cell-substrate impedance sensing (ECIS) based assay. With ECIS technology the impedance change of a current flow through the cell culture medium in an array plate is measured in a non-invasive manner, visualizing effects like cell attachment, cell-cell contacts or proliferation. Here we describe the potential of this online measurement technique in an in vitro model using the porcine ileal epithelial cell line IPI-2I in combination with an adenoviral transfection vector (Ad5-derivate). This approach shows a clear dose-depending toxic effect, as the amount of applied virus highly correlates (p<0.001) with the level of cell death. Thus this assay offers the possibility to discriminate the minimal non-toxic dose of the individual transfection method. In addition this work suggests that the ECIS-device bears the feasibility to transfer this assay to multiple other cytotoxicological questions.
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41
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Real-time monitoring of copper ions-induced cytotoxicity by EIS cell chips. Biosens Bioelectron 2010; 25:2711-6. [DOI: 10.1016/j.bios.2010.04.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 04/02/2010] [Accepted: 04/21/2010] [Indexed: 11/22/2022]
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Malleo D, Nevill JT, Lee LP, Morgan H. Continuous differential impedance spectroscopy of single cells. MICROFLUIDICS AND NANOFLUIDICS 2010; 9:191-198. [PMID: 20927185 PMCID: PMC2944380 DOI: 10.1007/s10404-009-0534-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Accepted: 11/11/2009] [Indexed: 05/21/2023]
Abstract
A device for continuous differential impedance analysis of single cells held by a hydrodynamic cell trapping is presented. Measurements are accomplished by recording the current from two closely-situated electrode pairs, one empty (reference) and one containing a cell. We demonstrate time-dependent measurement of single cell impedance produced in response to dynamic chemical perturbations. First, the system is used to assay the response of HeLa cells to the effects of the surfactant Tween, which reduces the impedance of the trapped cells in a concentration dependent way and is interpreted as gradual lysis of the cell membrane. Second, the effects of the bacterial pore-forming toxin, Streptolysin-O are measured: a transient exponential decay in the impedance is recorded as the cell membrane becomes increasingly permeable. The decay time constant is inversely proportional to toxin concentration (482, 150, and 30 s for 0.1, 1, and 10 kU/ml, respectively). ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10404-009-0534-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Daniele Malleo
- School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ UK
- Oxford Gene Technology, Begbroke Science Park, Oxford, OX5 1PF UK
| | - J. Tanner Nevill
- Department of Bioengineering, Biomolecular Nanotechnology Center, Berkeley Sensor and Actuator Center, University of California, Berkeley, CA 94720 USA
- Present Address: Fluxion Biosciences, South San Francisco, CA 94080 USA
| | - Luke P. Lee
- Department of Bioengineering, Biomolecular Nanotechnology Center, Berkeley Sensor and Actuator Center, University of California, Berkeley, CA 94720 USA
| | - Hywel Morgan
- School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ UK
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Wissenwasser J, Vellekoop M, Heer R. Highly sensitive passive radio frequency identification based sensor systems. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:025106. [PMID: 20192517 DOI: 10.1063/1.3316804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel platform for sensor applications based on radio frequency (rf) identification technology, where passive tags are powered by the rf-field of a reader, is presented. The sophisticated energy harvesting system of the tag enables a blanking of the rf-field for a defined period, while supplying the tag electronics with a highly stable voltage and a power of 25 mW for 100 ms. During this time, span measurements can be performed without interferences of the rf-field. The presented tags work without batteries and are designed for impedance measurements on microbiological cell cultures under physiological relevant conditions as well as in harsh environments.
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Affiliation(s)
- J Wissenwasser
- Nano-Systems, AIT Austrian Institute of Technology GmbH, 1220 Wien, Austria
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45
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Huang J, Yang G, Meng W, Wu L, Zhu A, Jiao X. An electrochemical impedimetric immunosensor for label-free detection of Campylobacter jejuni in diarrhea patients' stool based on O-carboxymethylchitosan surface modified Fe3O4 nanoparticles. Biosens Bioelectron 2009; 25:1204-11. [PMID: 19932018 DOI: 10.1016/j.bios.2009.10.036] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 10/22/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
Abstract
A novel electrochemical impedimetric immunosensor based on O-carboxymethylchitosan surface modified Fe(3)O(4) nanoparticles (denoted as OCMCS-Fe(3)O(4) nanoparticles) was developed for rapid detection of Campylobacter jejuni, which is becoming the most common cause of gastroenteritis in developed countries and raising major public health concerns worldwide. In the present study, anti-FlaA monoclonal antibodies 2D12 (denoted as 2D12McAbs) were immobilized on OCMCS-Fe(3)O(4) nanoparticles. The detection was performed by measuring relative change in impedance before and after 2D12McAbs-Campylobacter jejuni reaction with the technique of electrochemical impedance spectroscopy. Under the optimized conditions, the relative change in impedance was proportional to the logarithmic value of Campylobacter jejuni concentrations in the range of 1.0x10(3) to 1.0x10(7) CFU/mL (r=0.991). The advantages of the OCMCS-Fe(3)O(4) nanoparticle-based immunosensor are simplicity of use, fast response, wide linear range, acceptable reproducibility and long stability. Moreover, the immunosensor could be regenerated by being treated with glycine-HCl buffer solution (pH 2.8). We demonstrate the convenient application of the novel immunosensor for the detection of Campylobacter jejuni in diarrhea patients' stool samples.
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Affiliation(s)
- Jinlin Huang
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, PR China
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46
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Rümenapp C, Remm M, Wolf B, Gleich B. Improved method for impedance measurements of mammalian cells. Biosens Bioelectron 2009; 24:2915-9. [PMID: 19321331 DOI: 10.1016/j.bios.2009.02.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 02/04/2009] [Accepted: 02/23/2009] [Indexed: 10/21/2022]
Abstract
This study describes the use of impedance spectroscopy as a non-invasive tool to monitor cell proliferation and morphology and to obtain better measurements of cell kinetics. The goal was to determine test frequencies at which the cell behaviour towards different chemicals and toxins can be monitored with good time resolution. For optimisation of the test frequency it is in the first instance necessary to measure an impedance spectrum of the confluent cell layer. Secondly, the frequency of the highest peak in the spectrum will be determined and further experiments will be carried out at this fixed test frequency. In contrast to measurements at the mainly used 10 kHz (33%), signal differences between a confluent cell layer and cells after treatment with 0.2% Triton X-100 of up to 60% were obtained. In this work the measurements were carried out using interdigitated electrode structures (IDES) on a glass substrate. Impedance spectra of confluent L929 and MDA cell layers were obtained with the Solartron response analyzer.
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Affiliation(s)
- Christine Rümenapp
- Zentralinstitut für Medizintechnik der Technischen Universität München (IMETUM), Boltzmannstrasse 11, 85748 Garching, Germany
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Tarantola M, Schneider D, Sunnick E, Adam H, Pierrat S, Rosman C, Breus V, Sönnichsen C, Basché T, Wegener J, Janshoff A. Cytotoxicity of metal and semiconductor nanoparticles indicated by cellular micromotility. ACS NANO 2009; 3:213-22. [PMID: 19206269 DOI: 10.1021/nn800721j] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In the growing field of nanotechnology, there is an urgent need to sensitively determine the toxicity of nanoparticles since many technical and medical applications are based on controlled exposure to particles, that is, as contrast agents or for drug delivery. Before the in vivo implementation, in vitro cell experiments are required to achieve a detailed knowledge of toxicity and biodegradation as a function of the nanoparticles' physical and chemical properties. In this study, we show that the micromotility of animal cells as monitored by electrical cell-substrate impedance analysis (ECIS) is highly suitable to quantify in vitro cytotoxicity of semiconductor quantum dots and gold nanorods. The method is validated by conventional cytotoxicity testing and accompanied by fluorescence and dark-field microscopy to visualize changes in the cytoskeleton integrity and to determine the location of the particles within the cell.
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Affiliation(s)
- Marco Tarantola
- Institute of Physical Chemistry, University of Mainz, Jakob-Welder-Weg 11, 55128 Mainz, Germany
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48
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Ahmad A, Moore EJ. Comparison of Cell-Based Biosensors with Traditional Analytical Techniques for Cytotoxicity Monitoring and Screening of Polycyclic Aromatic Hydrocarbons in the Environment. ANAL LETT 2009. [DOI: 10.1080/00032710802564852] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Impedance studies of bio-behavior and chemosensitivity of cancer cells by micro-electrode arrays. Biosens Bioelectron 2009; 24:1305-10. [DOI: 10.1016/j.bios.2008.07.044] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2008] [Revised: 07/16/2008] [Accepted: 07/22/2008] [Indexed: 11/18/2022]
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50
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Juzenas P, Chen W, Sun YP, Coelho MAN, Generalov R, Generalova N, Christensen IL. Quantum dots and nanoparticles for photodynamic and radiation therapies of cancer. Adv Drug Deliv Rev 2008; 60:1600-14. [PMID: 18840487 PMCID: PMC2695009 DOI: 10.1016/j.addr.2008.08.004] [Citation(s) in RCA: 343] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 08/16/2008] [Indexed: 12/18/2022]
Abstract
Semiconductor quantum dots and nanoparticles composed of metals, lipids or polymers have emerged with promising applications for early detection and therapy of cancer. Quantum dots with unique optical properties are commonly composed of cadmium contained semiconductors. Cadmium is potentially hazardous, and toxicity of such quantum dots to living cells, and humans, is not yet systematically investigated. Therefore, search for less toxic materials with similar targeting and optical properties is of further interest. Whereas, the investigation of luminescence nanoparticles as light sources for cancer therapy is very interesting. Despite advances in neurosurgery and radiotherapy the prognosis for patients with malignant gliomas has changed little for the last decades. Cancer treatment requires high accuracy in delivering ionizing radiation to reduce toxicity to surrounding tissues. Recently some research has been focused in developing photosensitizing quantum dots for production of radicals upon absorption of visible light. In spite of the fact that visible light is safe, this approach is suitable to treat only superficial tumours. Ionizing radiation (X-rays and gamma rays) penetrate much deeper thus offering a big advantage in treating patients with tumours in internal organs. Such concept of using quantum dots and nanoparticles to yield electrons and radicals in photodynamic and radiation therapies as well their combination is reviewed in this article.
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Affiliation(s)
- Petras Juzenas
- Department of Radiation Biology, Institute for Cancer Research, Norwegian Radium Hospital, Rikshospitalet University Hospital, Montebello, 0310 Oslo, Norway.
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