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D M Campos C, Uning KT, Barmuta P, Markovic T, Yadav R, Mangraviti G, Ocket I, Van Roy W, Lagae L, Liu C. Use of high frequency electrorotation to identify cytoplasmic changes in cells non-disruptively. Biomed Microdevices 2023; 25:39. [PMID: 37801137 DOI: 10.1007/s10544-023-00677-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2023] [Indexed: 10/07/2023]
Abstract
In this paper we demonstrate how the use of frequencies ranging from 50 kHz to 5 GHz in the analysis of cells by electrorotation can open the path to the identification of differences not detectable by conventional set-ups. Earlier works usually reported electrorotation devices operating below 20 MHz, limiting the response obtained to properties associated with the cell membrane. Those devices are thus unable to resolve the physiological properties in the cytoplasm. We used microwave-based technology to extend the frequency operation to 5 GHz. At high frequencies (from tens of MHz to GHz), the electromagnetic signal passes through the membrane and allows probing the cytoplasm. This enables several applications, such as cell classification, and viability analysis. Additionally, the use of conventional microfabrication techniques reduces the cost and complexity of analysis, compared to other non-invasive methods. We demonstrated the potential of this set-up by identifying two different populations of T-lymphocytes not distinguishable through visual assessment. We also assessed the effect of calcein on cell cytoplasmic properties and used it as a controlled experiment to demonstrate the possibility of this method to detect changes happening predominantly in the cytoplasm.
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Affiliation(s)
- Camila D M Campos
- imec, Kapeldreef 75, 3001, Leuven, Belgium.
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium.
| | - Kevin T Uning
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- Institute of Electrical and Micro Engineering, Ecole Polytechnique Federal de Lausanne, Route Cantonale, 1015, Lausanne, Switzerland
| | - Pawel Barmuta
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium
| | - Tomislav Markovic
- Department Electrical Engineering, KU Leuven, Kasteelpark Arenberg 10, 3001, Leuven, Belgium
- Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, 10000, Zagreb, Croatia
| | - Rahul Yadav
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- imec OnePlanet Research Center, Bronland 10, 6708 WE, Wageningen, The Netherlands
| | | | - Ilja Ocket
- imec, Kapeldreef 75, 3001, Leuven, Belgium
| | | | - Liesbet Lagae
- imec, Kapeldreef 75, 3001, Leuven, Belgium
- Department Physics and Astronomy, KU Leuven, Celestijnenlaan 200d, 3001, Leuven, Belgium
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2
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Lavi ED, Crivellari F, Gagnon Z. Dielectrophoretic detection of electrical property changes of stored human red blood cells. Electrophoresis 2022; 43:1297-1308. [DOI: 10.1002/elps.202100241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 12/21/2021] [Accepted: 01/04/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Edwin D. Lavi
- Department of Chemical Engineering Texas A&M University College Station Texas USA
| | | | - Zachary Gagnon
- Department of Chemical Engineering Texas A&M University College Station Texas USA
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3
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Maidin NNM, Buyong MR, Rahim RA, Mohamed MA. Dielectrophoresis applications in biomedical field and future perspectives in biomedical technology. Electrophoresis 2021; 42:2033-2059. [PMID: 34346062 DOI: 10.1002/elps.202100043] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 07/25/2021] [Accepted: 07/27/2021] [Indexed: 11/09/2022]
Abstract
Dielectrophoresis (DEP) is a technique to manipulate trajectories of polarisable particles in non-uniform electric fields by utilising unique dielectric properties. The manipulation of a cell using DEP has been demonstrated in various modes, thereby indicating potential applications in the biomedical field. In this review, recent DEP applications in the biomedical field are discussed. This review is intended to highlight research work that shows significant approach related to dielectrophoresis application in biomedical field reported between 2016 and 2020. Firstly, single-shell model and multiple-shell model of cells are introduced. Current device structures and recently introduced electrode patterns for DEP applications are discussed. Secondly, the biomedical uses of DEP in liquid biopsies, stem cell therapies, and diagnosis of infectious diseases due to bacteria and viruses are presented. Finally, the challenges in DEP research are discussed, and the reported solutions are explained. DEP's potential research directions are mentioned. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Nur Nasyifa Mohd Maidin
- Institute of Microengineering and Nanoelectronic (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, 43600, Malaysia
| | - Muhamad Ramdzan Buyong
- Institute of Microengineering and Nanoelectronic (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, 43600, Malaysia
| | - Ruslinda A Rahim
- Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, 01000, Malaysia.,National Nanotechnology Centre (NNC), Ministry of Science Technology and Innovation (MOSTI), Federal Government Administrative Centre, Putrajaya, 62662, Malaysia
| | - Mohd Ambri Mohamed
- Institute of Microengineering and Nanoelectronic (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, 43600, Malaysia
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4
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Liang W, Yang X, Wang J, Wang Y, Yang W, Liu L. Determination of Dielectric Properties of Cells using AC Electrokinetic-based Microfluidic Platform: A Review of Recent Advances. MICROMACHINES 2020; 11:E513. [PMID: 32438680 PMCID: PMC7281274 DOI: 10.3390/mi11050513] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/16/2020] [Accepted: 05/18/2020] [Indexed: 12/18/2022]
Abstract
Cell dielectric properties, a type of intrinsic property of cells, can be used as electrophysiological biomarkers that offer a label-free way to characterize cell phenotypes and states, purify clinical samples, and identify target cancer cells. Here, we present a review of the determination of cell dielectric properties using alternating current (AC) electrokinetic-based microfluidic mechanisms, including electro-rotation (ROT) and dielectrophoresis (DEP). The review covers theoretically how ROT and DEP work to extract cell dielectric properties. We also dive into the details of differently structured ROT chips, followed by a discussion on the determination of cell dielectric properties and the use of these properties in bio-related applications. Additionally, the review offers a look at the future challenges facing the AC electrokinetic-based microfluidic platform in terms of acquiring cell dielectric parameters. Our conclusion is that this platform will bring biomedical and bioengineering sciences to the next level and ultimately achieve the shift from lab-oriented research to real-world applications.
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Affiliation(s)
- Wenfeng Liang
- School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China; (X.Y.); (J.W.)
| | - Xieliu Yang
- School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China; (X.Y.); (J.W.)
| | - Junhai Wang
- School of Mechanical Engineering, Shenyang Jianzhu University, Shenyang 110168, China; (X.Y.); (J.W.)
| | - Yuechao Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;
| | - Wenguang Yang
- School of Electromechanical and Automotive Engineering, Yantai University, Yantai 264005, China;
| | - Lianqing Liu
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China;
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5
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Ma F, Zhang A, Chang D, Velev OD, Wiltberger K, Kshirsagar R. Real-time monitoring and control of CHO cell apoptosis by in situ multifrequency scanning dielectric spectroscopy. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Henslee EA, Torcal Serrano RM, Labeed FH, Jabr RI, Fry CH, Hughes MP, Hoettges KF. Accurate quantification of apoptosis progression and toxicity using a dielectrophoretic approach. Analyst 2018; 141:6408-6415. [PMID: 27774532 DOI: 10.1039/c6an01596d] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A loss of ability of cells to undergo apoptosis (programmed cell death, whereby the cell ceases to function and destroys itself) is commonly associated with cancer, and many anti-cancer interventions aim to restart the process. Consequently, the accurate quantification of apoptosis is essential in understanding the function and performance of new anti-cancer drugs. Dielectrophoresis has previously been demonstrated to detect apoptosis more rapidly than other methods, and is low-cost, label-free and rapid, but has previously been unable to accurately quantify cells through the apoptotic process because cells in late apoptosis disintegrate, making cell tracking impossible. In this paper we use a novel method based on light absorbance and multi-population tracking to quantify the progress of apoptosis, benchmarking against conventional assays including MTT, trypan blue and Annexin-V. Analyses are performed on suspension and adherent cells, and using two apoptosis-inducing agents. IC50 measurements compared favourably to MTT and were superior to trypan blue, whilst also detecting apoptotic progression faster than Annexin-V.
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Affiliation(s)
- Erin A Henslee
- Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
| | - Ruth M Torcal Serrano
- Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
| | - Fatima H Labeed
- Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
| | - Rita I Jabr
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK
| | - Christopher H Fry
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK
| | - Michael P Hughes
- Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
| | - Kai F Hoettges
- Centre for Biomedical Engineering, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK.
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7
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Lownes Urbano R, Morss Clyne A. An inverted dielectrophoretic device for analysis of attached single cell mechanics. LAB ON A CHIP 2016; 16:561-73. [PMID: 26738543 PMCID: PMC4734981 DOI: 10.1039/c5lc01297j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Dielectrophoresis (DEP), the force induced on a polarizable body by a non-uniform electric field, has been widely used to manipulate single cells in suspension and analyze their stiffness. However, most cell types do not naturally exist in suspension but instead require attachment to the tissue extracellular matrix in vivo. Cells alter their cytoskeletal structure when they attach to a substrate, which impacts cell stiffness. It is therefore critical to be able to measure mechanical properties of cells attached to a substrate. We present a novel inverted quadrupole dielectrophoretic device capable of measuring changes in the mechanics of single cells attached to a micropatterned polyacrylamide gel. The device is positioned over a cell of defined size, a directed DEP pushing force is applied, and cell centroid displacement is dynamically measured by optical microscopy. Using this device, single endothelial cells showed greater centroid displacement in response to applied DEP pushing force following actin cytoskeleton disruption by cytochalasin D. In addition, transformed mammary epithelial cell (MCF10A-NeuT) showed greater centroid displacement in response to applied DEP pushing force compared to untransformed cells (MCF10A). DEP device measurements were confirmed by showing that the cells with greater centroid displacement also had a lower elastic modulus by atomic force microscopy. The current study demonstrates that an inverted DEP device can determine changes in single attached cell mechanics on varied substrates.
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Affiliation(s)
- Rebecca Lownes Urbano
- Drexel University, Department of Mechanical Engineering and Mechanics, 3141 Chestnut Street, Philadelphia, PA 19104, USA.
| | - Alisa Morss Clyne
- Drexel University, Department of Mechanical Engineering and Mechanics, 3141 Chestnut Street, Philadelphia, PA 19104, USA.
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8
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Vaillier C, Honegger T, Kermarrec F, Gidrol X, Peyrade D. Involvement of membrane proteins and ion channels on the self-rotation of human cells in a non-rotating AC electric field. Electrophoresis 2015; 36:1123-9. [PMID: 25808576 DOI: 10.1002/elps.201400478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 02/27/2014] [Accepted: 03/17/2015] [Indexed: 11/05/2022]
Abstract
Dielectrophoresis is a force that has been exploited in microsystems for label-free characterization and separation of cells, when their electrical signature is known. However, the polarization effect of cells at the transmembrane protein level is not well established. In this work, we have use the self-rotation effect of cells in a non-rotating field, known as the "Quincke effect," in order to measure the maximum rotation frequency (frotmax ) of different cell populations when modifying the composition of their membrane. We investigated the influence of active ionic transportation of membrane protein concentration on frotmax of HEK cells. Our results show that ionic transportation is responsible for the reduction of conductivity within the cytoplasm, which results in higher frotmax . However, the influence of the concentration of proteins in the membrane, achieved by silencing gene expression in cancer cells, changes significantly frotmax , which is not explained by the changes of ionic conductivity within the cell.
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Affiliation(s)
- Clarisse Vaillier
- Univ. Grenoble Alpes, LTM, Grenoble, France.,LTM, CNRS, Grenoble, France
| | - Thibault Honegger
- Univ. Grenoble Alpes, LTM, Grenoble, France.,LTM, CNRS, Grenoble, France
| | - Frédérique Kermarrec
- CEA, Institut de Recherches en Technologies et Sciences pour le Vivant, Grenoble, France
| | - Xavier Gidrol
- CEA, Institut de Recherches en Technologies et Sciences pour le Vivant, Grenoble, France
| | - David Peyrade
- Univ. Grenoble Alpes, LTM, Grenoble, France.,LTM, CNRS, Grenoble, France
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9
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Zheng Y, Shojaei-Baghini E, Wang C, Sun Y. Microfluidic characterization of specific membrane capacitance and cytoplasm conductivity of singlecells. Biosens Bioelectron 2013; 42:496-502. [DOI: 10.1016/j.bios.2012.10.081] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 10/23/2012] [Accepted: 10/24/2012] [Indexed: 11/26/2022]
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10
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Pierzchalski A, Hebeisen M, Mittag A, Bocsi J, Di Berardino M, Tarnok A. Label-free hybridoma cell culture quality control by a chip-based impedance flow cytometer. LAB ON A CHIP 2012; 12:4533-4543. [PMID: 22907524 DOI: 10.1039/c2lc40408g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Impedance flow cytometry (IFC) was evaluated as a possible alternative to fluorescence-based methods for on-line quality monitoring of hybridoma cells. Hybridoma cells were cultured at different cell densities and viability was estimated by means of IFC and fluorescence-based flow cytometry (FCM). Cell death was determined by measuring the impedance phase value at high frequency in low conductivity buffer. IFC data correlate well with reference FCM measurements using AnnexinV and 7-AAD staining. Hybridoma cells growing at different densities in cell culture revealed a density-dependent subpopulation pattern. Living cells of high density cultures show reduced impedance amplitudes, indicating particular cellular changes. Dead cell subpopulations become evident in cultures with increasing cell densities. In addition, a novel intermediate subpopulation, which most probably represents apoptotic cells, was identified. These results emphasize the extraordinary sensitivity of high frequency impedance measurements and their suitability for hybridoma cell culture quality control.
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11
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Petiot E, El-Wajgali A, Esteban G, Gény C, Pinton H, Marc A. Real-time monitoring of adherent Vero cell density and apoptosis in bioreactor processes. Cytotechnology 2012; 64:429-41. [PMID: 22367019 DOI: 10.1007/s10616-011-9421-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Accepted: 12/16/2011] [Indexed: 10/28/2022] Open
Abstract
This study proposes an easy to use in situ device, based on multi-frequency permittivity measurements, to monitor the growth and death of attached Vero cells cultivated on microporous microcarriers, without any cell sampling. Vero cell densities were on-line quantified up to 10(6) cell mL(-1). Some parameters which could potentially impact Vero cell morphological and physiological states were assessed through different culture operating conditions, such as media formulation or medium feed-harvest during cell growth phase. A new method of in situ cell death detection with dielectric spectroscopy was also successfully implemented. Thus, through permittivity frequency scanning, major rises of the apoptotic cell population in bioreactor cultures were detected by monitoring the characteristic frequency of the cell population, f(c), which is one of the culture dielectric parameters. Both cell density quantification and cell apoptosis detection are strategic information in cell-based production processes as they are involved in major events of the process, such as scale-up or choice of the viral infection conditions. This new application of dielectric spectroscopy to adherent cell culture processes makes it a very promising tool for risk-mitigation strategy in industrial processes. Therefore, our results contribute to the development of Process Analytical Technology in cell-based industrial processes.
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Affiliation(s)
- Emma Petiot
- Laboratoire Réactions et Génie des Procédés, UPR CNRS 3349, Nancy-Université, 2 avenue de la Forêt de Haye, 54505, Vandoeuvre-lès-Nancy Cedex, France,
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12
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Asami K. Dielectric properties of microvillous cells simulated by the three-dimensional finite-element method. Bioelectrochemistry 2011; 81:28-33. [PMID: 21333613 DOI: 10.1016/j.bioelechem.2011.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 01/04/2011] [Accepted: 01/11/2011] [Indexed: 11/17/2022]
Abstract
Most of biological cells have microvilli on their surfaces, which significantly influence their dielectric properties. The complex permittivity of a cubical system containing a spherical cell model with cylindrical projections was calculated over a frequency range of 10 kHz to 100 MHz using the three-dimensional finite-element method. The spectra of the complex permittivity consisted of low- and high-frequency relaxation processes which were respectively attributed to the polarization of the membranes covering the projections and the spherical body. Conventional analysis based on the spherical shell model was applied to the simulated spectra to discuss the effects of cell surface morphology on the electric parameters estimated for the plasma membrane and the cytoplasm.
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Affiliation(s)
- Koji Asami
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
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13
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Kurz CM, Büth H, Sossalla A, Vermeersch V, Toncheva V, Dubruel P, Schacht E, Thielecke H. Chip-based impedance measurement on single cells for monitoring sub-toxic effects on cell membranes. Biosens Bioelectron 2011; 26:3405-12. [PMID: 21316211 DOI: 10.1016/j.bios.2011.01.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Revised: 12/18/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
Abstract
There is a lack of methods suitable for generation of data about the dynamics of effects on cell membranes with a high sensitivity. Such methods are urgently needed to support the optimisation of interaction of substances, particles or materials with cell. The goal of this article is to use an improved microhole chip system to monitor the alterations of cells due to the interactions of polymer-DNA complexes. This should demonstrate exemplarily that subtoxic effect of biological relevant particles or substances at relevant concentrations can be monitored for several hours. By using a microhole cell chip and a microfluidic unit single cells can be electrically interfaced via microholes and the use of small electrodes with high impedances is not necessary. For separation and positioning of the cells onto the hole negative pressure is applied on the reverse side of the chip. Under cell culture conditions the cell starts to spread on the biocompatible insulating chip membrane resulting in a stable interface to an adherent growing cell. After the spreading process is finished, the polymer/polyplex solution is added and the impedance is measured with respect to time. To illustrate the cellular parameter which can affect the measured impedance a simple simulation based on the finite element method (FEM) is performed. It was shown for the first time that the impedance-based method predicated on the microhole chip can be used for biological relevant substances at relevant concentrations and that it is more sensitive than the well-established biological marker.
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Affiliation(s)
- Christian M Kurz
- Fraunhofer Institute for Biomedical Engineering, Ensheimer Str. 38, 66386 St. Ingbert, Germany
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Abstract
Extraordinary advances in lab on a chip systems have been made on the basis of the development of micro/nanofluidics and its fusion with other technologies based on electrokinetics and optics. Optoelectrofluidic technology, which has been recently introduced as a new manipulation scheme, allows programmable manipulation of particles or fluids in microenvironments based on optically induced electrokinetics. Herein, the behaviour of particles or fluids can be controlled by inducing or perturbing electric fields on demand in an optical manner, which includes photochemical, photoconductive, and photothermal effects. This elegant scheme of the optoelectrofluidic platform has attracted attention in various fields of science and engineering. A lot of research on optoelectrofluidic manipulation technologies has been reported and the field has advanced rapidly, although some technical hurdles still remain. This review describes recent developments and future perspectives of optoelectrofluidic platforms for chemical and biological applications.
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Affiliation(s)
- Hyundoo Hwang
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Republic of Korea
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Mark D, Haeberle S, Roth G, Von Stetten F, Zengerle R. Microfluidic Lab-on-a-Chip Platforms: Requirements, Characteristics and Applications. MICROFLUIDICS BASED MICROSYSTEMS 2010. [DOI: 10.1007/978-90-481-9029-4_17] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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16
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Mark D, Haeberle S, Roth G, von Stetten F, Zengerle R. Microfluidic lab-on-a-chip platforms: requirements, characteristics and applications. Chem Soc Rev 2010; 39:1153-82. [PMID: 20179830 DOI: 10.1039/b820557b] [Citation(s) in RCA: 765] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daniel Mark
- HSG-IMIT-Institut für Mikro- und Informationstechnik, Wilhelm-Schickard-Strasse 10, 78052 Villingen-Schwenningen, Germany
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Choi W, Kim JS, Lee DH, Lee KK, Koo DB, Park JK. Dielectrophoretic oocyte selection chip for in vitro fertilization. Biomed Microdevices 2008; 10:337-45. [PMID: 18071907 DOI: 10.1007/s10544-007-9141-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This paper reports a new dielectrophoretic separation method of porcine oocytes for in vitro fertilization. Conventional manual selection of oocyte highly depends on the expert's experience and lacks universal standards for identifying the quality of oocyte. In this study, an electrode array chip with castellated shape was developed to evaluate dielectrophoretic velocities of oocytes, under applied bias conditions with an AC 3 V waveform at 1 MHz for 15 s. Based on different dielectrophoresis (DEP) response, the selected group of oocytes that moved showed a better developmental potential than the group of oocytes that stayed, representing a higher rate of blastocyst formation and a lower rate of polyspermic fertilization. In addition, the overall developmental potential of oocytes selected by the DEP device was comparable to that of oocytes selected by conventional manual method. These results demonstrate that the difference in dielectrophoretic velocity can be used to establish an objective criterion for the selection of oocytes. Consequently, this method will open the possibility to develop an automatic tool for oocyte selection, which would be helpful for assisted reproductive technologies such as transgenic and clonal animal production.
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Affiliation(s)
- Wonjae Choi
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Gwahangno, Yuseong-gu, Daejeon, 305-701, Republic of Korea
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