1
|
Gilmore J, Islam M, Duncan J, Natu R, Martinez-Duarte R. Assessing the importance of the root mean square (RMS) value of different waveforms to determine the strength of a dielectrophoresis trapping force. Electrophoresis 2017; 38:2561-2564. [DOI: 10.1002/elps.201600551] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 04/03/2017] [Accepted: 04/13/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Jordon Gilmore
- Multiscale Manufacturing Laboratory, Department of Mechanical Engineering; Clemson University; Clemson SC, USA
| | - Monsur Islam
- Multiscale Manufacturing Laboratory, Department of Mechanical Engineering; Clemson University; Clemson SC, USA
| | - Josie Duncan
- Multiscale Manufacturing Laboratory, Department of Mechanical Engineering; Clemson University; Clemson SC, USA
| | - Rucha Natu
- Multiscale Manufacturing Laboratory, Department of Mechanical Engineering; Clemson University; Clemson SC, USA
| | - Rodrigo Martinez-Duarte
- Multiscale Manufacturing Laboratory, Department of Mechanical Engineering; Clemson University; Clemson SC, USA
| |
Collapse
|
2
|
Habaza M, Kirschbaum M, Guernth‐Marschner C, Dardikman G, Barnea I, Korenstein R, Duschl C, Shaked NT. Rapid 3D Refractive-Index Imaging of Live Cells in Suspension without Labeling Using Dielectrophoretic Cell Rotation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1600205. [PMID: 28251046 PMCID: PMC5323858 DOI: 10.1002/advs.201600205] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/14/2016] [Indexed: 05/19/2023]
Abstract
A major challenge in the field of optical imaging of live cells is achieving rapid, 3D, and noninvasive imaging of isolated cells without labeling. If successful, many clinical procedures involving analysis and sorting of cells drawn from body fluids, including blood, can be significantly improved. A new label-free tomographic interferometry approach is presented. This approach provides rapid capturing of the 3D refractive-index distribution of single cells in suspension. The cells flow in a microfluidic channel, are trapped, and then rapidly rotated by dielectrophoretic forces in a noninvasive and precise manner. Interferometric projections of the rotated cell are acquired and processed into the cellular 3D refractive-index map. Uniquely, this approach provides full (360°) coverage of the rotation angular range around any axis, and knowledge on the viewing angle. The experimental demonstrations presented include 3D, label-free imaging of cancer cells and three types of white blood cells. This approach is expected to be useful for label-free cell sorting, as well as for detection and monitoring of pathological conditions resulting in cellular morphology changes or occurrence of specific cell types in blood or other body fluids.
Collapse
Affiliation(s)
- Mor Habaza
- Department of Biomedical EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv69978Israel
| | - Michael Kirschbaum
- Fraunhofer Institute for Cell Therapy and ImmunologyBranch PotsdamAm Muehlenberg 1314476PotsdamGermany
| | | | - Gili Dardikman
- Department of Biomedical EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv69978Israel
| | - Itay Barnea
- Department of Biomedical EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv69978Israel
- Department of Physiology and PharmacologyFaculty of MedicineTel Aviv UniversityTel Aviv69978Israel
| | - Rafi Korenstein
- Department of Physiology and PharmacologyFaculty of MedicineTel Aviv UniversityTel Aviv69978Israel
| | - Claus Duschl
- Fraunhofer Institute for Cell Therapy and ImmunologyBranch PotsdamAm Muehlenberg 1314476PotsdamGermany
| | - Natan T. Shaked
- Department of Biomedical EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv69978Israel
| |
Collapse
|
3
|
Jain J, Veggiani G, Howarth M. Cholesterol loading and ultrastable protein interactions determine the level of tumor marker required for optimal isolation of cancer cells. Cancer Res 2013; 73:2310-21. [PMID: 23378340 PMCID: PMC3618857 DOI: 10.1158/0008-5472.can-12-2956] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cell isolation via antibody-targeted magnetic beads is a powerful tool for research and clinical applications, most recently for isolating circulating tumor cells (CTC). Nonetheless fundamental features of the cell-bead interface are still unknown. Here we apply a clinically relevant antibody against the cancer target HER2 (ErbB2) for magnetic cell isolation. We investigate how many target proteins per cell are sufficient for a cell to be isolated. To understand the importance of primary antibody affinity, we compared a series of point mutants with known affinities and show that even starting with subnanomolar affinity, improving antibody affinity improved cell isolation. To test the importance of the connection between the primary antibody and the magnetic bead, we compared bridging the antibody to the beads with Protein L, secondary antibody, or streptavidin: the high-stability streptavidin-biotin linkage improved sensitivity by an order of magnitude. Cytoskeletal polymerization did not have a major effect on cell isolation, but isolation was inhibited by cholesterol depletion and enhanced by cholesterol loading of cells. Analyzing a panel of human cancer cell lines spanning a wide range of expression showed that the standard approach could only isolate the highest expressing cells. However, our optimization of cholesterol level, primary antibody affinity, and antibody-bead linkage allowed efficient and specific isolation of cells expressing low levels of HER2 or epithelial cell adhesion molecule. These insights should guide future approaches to cell isolation, either magnetically or using other means, and extend the range of cellular antigens and biomarkers that can be targeted for CTC isolation in cancer research and diagnosis.
Collapse
Affiliation(s)
- Jayati Jain
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Gianluca Veggiani
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Mark Howarth
- Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| |
Collapse
|
4
|
Fuhr G, Schnelle T. Dielektrische Mikrofeldkäfige: Mit elektrischen Hochfrequenzfeldern lassen sich Zellen, Viren und Makromoleküle festhalten und umherschieben. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/phbl.20010570113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
5
|
Moschallski M, Hausmann M, Posch A, Paulus A, Kunz N, Duong TT, Angres B, Fuchsberger K, Steuer H, Stoll D, Werner S, Hagmeyer B, Stelzle M. MicroPrep: Chip-based dielectrophoretic purification of mitochondria. Electrophoresis 2010; 31:2655-63. [DOI: 10.1002/elps.201000097] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
6
|
Jeney S, Mor F, Koszali R, Forró L, Moy VT. Monitoring ligand-receptor interactions by photonic force microscopy. NANOTECHNOLOGY 2010; 21:255102. [PMID: 20516583 PMCID: PMC3255327 DOI: 10.1088/0957-4484/21/25/255102] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We introduce a method for the acquisition of single molecule force measurements of ligand-receptor interactions using the photonic force microscope (PFM). Biotin-functionalized beads, manipulated with an optical trap, and a streptavidin-functionalized coverslip were used to measure the effect of different pulling forces on the lifetime of individual streptavidin-biotin complexes. By optimizing the design of the optical trap and selection of the appropriate bead size, pulling forces in excess of 50 pN were achieved. Based on the amplitude of three-dimensional (3D) thermal position fluctuations of the attached bead, we were able to select for a bead-coverslip interaction that was mediated by a single streptavidin-biotin complex. Moreover, the developed experimental system was greatly accelerated by automation of data acquisition and analysis. In force-dependent kinetic measurements carried out between streptavidin and biotin, we observed that the streptavidin-biotin complex exhibited properties of a catch bond, with the lifetime increasing tenfold when the pulling force increased from 10 to 20 pN. We also show that silica beads were more appropriate than polystyrene beads for the force measurements, as tethers, longer than 200 nm, could be extracted from polystyrene beads.
Collapse
Affiliation(s)
- Sylvia Jeney
- M.E. Müller Institute for Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, Basel, 4056, Switzerland
- Institute of Condensed Matter Physics (IPMC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Flavio Mor
- Institute of Condensed Matter Physics (IPMC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Roland Koszali
- Institute for Information and Communication Technologies (IICT), University of Applied Sciences of Western Switzerland (HEIG-VD), Rue Galilée 15, CH 1401 Yverdon-les-bains, Switzerland
| | - László Forró
- Institute of Condensed Matter Physics (IPMC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Vincent T. Moy
- University of Miami Miller School of Medicine, Physiology & Biophysics Department, 1600 NW 10 Ave., Miami, FL 33136 U.S.A
| |
Collapse
|
7
|
Gabriele S, Versaevel M, Preira P, Théodoly O. A simple microfluidic method to select, isolate, and manipulate single-cells in mechanical and biochemical assays. LAB ON A CHIP 2010; 10:1459-67. [PMID: 20480111 DOI: 10.1039/c002257h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This article describes a simple and low-tech microfluidic method for single-cell experimentation, which permits cell selection without stress, cell manipulation with fine control, and passive self-exclusion of all undesired super-micronic particles. The method requires only conventional soft lithography microfabrication techniques and is applicable to any microfluidic single-cell circuitry. The principle relies on a bypass plugged in parallel with a single-cell assay device and collecting 97% of the flow rate. Cell selection into the single cell device is performed by moving the cell of interest back and forth in the vicinity of the junction between the bypass and the analysis circuitry. Cell navigation is finely controlled by hydrostatic pressure via centimetre-scale actuation of external macroscopic reservoirs connected to the device. We provide successful examples of biomechanical and biochemical assays on living human leukocytes passing through 4 mum wide capillaries. The blebbing process dynamics are monitored by conventional 24 fps videomicroscopy and subcellular cytoskeleton organization is imaged by on-chip immunostaining.
Collapse
Affiliation(s)
- Sylvain Gabriele
- Université de Mons, Laboratoire Interfaces & Fluides Complexes, Centre d'Innovation et de Recherche en Matériaux (CIRMAP), 20, Place du Parc, B-7000 Mons, Belgique
| | | | | | | |
Collapse
|
8
|
Kirschbaum M, Jaeger MS, Duschl C. Correlating short-term Ca(2+) responses with long-term protein expression after activation of single T cells. LAB ON A CHIP 2009; 9:3517-3525. [PMID: 20024031 DOI: 10.1039/b911865a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In order to elucidate the dynamics of cellular processes that are induced in context with intercellular communication, defined events along the signal transduction cascade and subsequent activation steps have to be analyzed on the level of individual cells and correlated with each other. Here we present an approach that allows the initiation of cell-cell or cell-particle interactions and the analysis of cellular reactions within various regimes while the identity of each individual cell is preserved. It utilizes dielectrophoresis (DEP) and microfluidics in a lab-on-chip system. With high spatial and temporal precision we contacted single T cells with functionalized microbeads and monitored their immediate cytosolic Ca(2+) response. After this, the cells were released from the chip system and cultivated further. Expression of the activation marker molecule CD69 was analyzed the next day and correlated with the previously recorded Ca(2+) signal for each individual cell. We found a significant difference in the patterns of Ca(2+) traces between activated and non-activated cells, which shows that Ca(2+) signals in T cells can provide early information about a later reaction of the cell. Although T cells are non-excitable cells, we also observed irregular Ca(2+) transients upon exposure to the DEP field only. These Ca(2+) signals depended on exposure time, electric field strength and field frequency. By minimizing their occurrence rate, we could identify experimental conditions that caused the least interference with the physiology of the cell.
Collapse
Affiliation(s)
- Michael Kirschbaum
- Fraunhofer Institute for Biomedical Engineering (IBMT), Am Muehlenberg 13, 14476 Potsdam, Germany
| | | | | |
Collapse
|
9
|
Riehemann K, Schneider S, Luger T, Godin B, Ferrari M, Fuchs H. Nanomedizin - Herausforderung und Perspektiven. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200802585] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
10
|
Riehemann K, Schneider SW, Luger TA, Godin B, Ferrari M, Fuchs H. Nanomedicine--challenge and perspectives. Angew Chem Int Ed Engl 2009; 48:872-97. [PMID: 19142939 PMCID: PMC4175737 DOI: 10.1002/anie.200802585] [Citation(s) in RCA: 822] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The application of nanotechnology concepts to medicine joins two large cross-disciplinary fields with an unprecedented societal and economical potential arising from the natural combination of specific achievements in the respective fields. The common basis evolves from the molecular-scale properties relevant to the two fields. Local probes and molecular imaging techniques allow surface and interface properties to be characterized on a nanometer scale at predefined locations, while chemical approaches offer the opportunity to elaborate and address surfaces, for example, for targeted drug delivery, enhanced biocompatibility, and neuroprosthetic purposes. However, concerns arise in this cross-disciplinary area about toxicological aspects and ethical implications. This Review gives an overview of selected recent developments and applications of nanomedicine.
Collapse
Affiliation(s)
- Kristina Riehemann
- Dr. K. Riehemann, Prof. Dr. H. Fuchs, Center for Nanotechnology (CeNTech) and Physical Institute; WWU Münster, Wilhelm Klemm-Str. 10, 48149 Münster, Germany, Fax:+49 (251) 83 33602, , Homepage: http://www.uni-muenster.de/Physik.PI/Fuchs/
| | | | | | | | | | - Harald Fuchs
- Dr. K. Riehemann, Prof. Dr. H. Fuchs, Center for Nanotechnology (CeNTech) and Physical Institute; WWU Münster, Wilhelm Klemm-Str. 10, 48149 Münster, Germany, Fax:+49 (251) 83 33602, , Homepage: http://www.uni-muenster.de/Physik.PI/Fuchs/
| |
Collapse
|
11
|
James T, Mannoor MS, Ivanov DV. BioMEMS -Advancing the Frontiers of Medicine. SENSORS (BASEL, SWITZERLAND) 2008; 8:6077-6107. [PMID: 27873858 PMCID: PMC3705549 DOI: 10.3390/s8096077] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2008] [Revised: 09/16/2008] [Accepted: 09/24/2008] [Indexed: 12/22/2022]
Abstract
Biological and medical application of micro-electro-mechanical-systems (MEMS) is currently seen as an area of high potential impact. Integration of biology and microtechnology has resulted in the development of a number of platforms for improving biomedical and pharmaceutical technologies. This review provides a general overview of the applications and the opportunities presented by MEMS in medicine by classifying these platforms according to their applications in the medical field.
Collapse
Affiliation(s)
- Teena James
- Microelectronics Research Center and New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
- Dept of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
| | - Manu Sebastian Mannoor
- Microelectronics Research Center and New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
- Dept of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
| | - Dentcho V. Ivanov
- Microelectronics Research Center and New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
- Dept of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, U.S.A.; E-mail: (M. S. M.)
| |
Collapse
|
12
|
Kirschbaum M, Jaeger MS, Schenkel T, Breinig T, Meyerhans A, Duschl C. T cell activation on a single-cell level in dielectrophoresis-based microfluidic devices. J Chromatogr A 2008; 1202:83-9. [DOI: 10.1016/j.chroma.2008.06.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 06/11/2008] [Accepted: 06/17/2008] [Indexed: 10/21/2022]
|
13
|
Derveaux S, Stubbe BG, Braeckmans K, Roelant C, Sato K, Demeester J, De Smedt SC. Synergism between particle-based multiplexing and microfluidics technologies may bring diagnostics closer to the patient. Anal Bioanal Chem 2008; 391:2453-67. [PMID: 18458889 PMCID: PMC2516543 DOI: 10.1007/s00216-008-2062-4] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Revised: 02/04/2008] [Accepted: 03/06/2008] [Indexed: 12/18/2022]
Abstract
In the field of medical diagnostics there is a growing need for inexpensive, accurate, and quick high-throughput assays. On the one hand, recent progress in microfluidics technologies is expected to strongly support the development of miniaturized analytical devices, which will speed up (bio)analytical assays. On the other hand, a higher throughput can be obtained by the simultaneous screening of one sample for multiple targets (multiplexing) by means of encoded particle-based assays. Multiplexing at the macro level is now common in research labs and is expected to become part of clinical diagnostics. This review aims to debate on the “added value” we can expect from (bio)analysis with particles in microfluidic devices. Technologies to (a) decode, (b) analyze, and (c) manipulate the particles are described. Special emphasis is placed on the challenges of integrating currently existing detection platforms for encoded microparticles into microdevices and on promising microtechnologies that could be used to down-scale the detection units in order to obtain compact miniaturized particle-based multiplexing platforms.
Collapse
Affiliation(s)
- S Derveaux
- Laboratory of General Biochemistry and Physical Pharmacy, Department of Pharmaceutics, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium
| | | | | | | | | | | | | |
Collapse
|
14
|
Anselmetti D, Hansmeier N, Kalinowski J, Martini J, Merkle T, Palmisano R, Ros R, Schmied K, Sischka A, Toensing K. Analysis of subcellular surface structure, function and dynamics. Anal Bioanal Chem 2007; 387:83-9. [PMID: 17082883 DOI: 10.1007/s00216-006-0789-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2006] [Revised: 08/16/2006] [Accepted: 08/18/2006] [Indexed: 10/24/2022]
Abstract
Analytics of single biological cells allows quantitative investigation from a structural, functional and dynamical point of view and opens novel possibilities to an unamplified subcellular analysis. In this article, we report on three different experimental methods and their applications to single cellular systems with a subcellular sensitivity down to the single molecule level. First, the subcellular surface structure of living bacteria (Corynebacterium glutamicum) was investigated with atomic force microscopy (AFM) at the resolution of individual surface layer (S-layer) proteins; discrimination of bacterial strains that lack the expression of hexagonally packed surface layer proteins was possible. Second, quantitative measurement of individual recognition events of membrane-bound receptors on living B-cells was achieved in single cell manipulation and probing experiments with optical tweezers (OT) force spectroscopy. And third, intracellular dynamics of translocating photoactivatable GFP in plant protoplasts (Nicotiana tabacum BY-2) was quantitatively monitored by two-photon laser scanning microscopy (2PLSM).
Collapse
Affiliation(s)
- D Anselmetti
- Experimental Biophysics and Applied Nanoscience, Faculty of Physics, Bielefeld University, Universitätsstrasse 25, 33615, Bielefeld, Germany.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Helmke BP, Minerick AR. Designing a nano-interface in a microfluidic chip to probe living cells: challenges and perspectives. Proc Natl Acad Sci U S A 2006; 103:6419-24. [PMID: 16618928 PMCID: PMC1458901 DOI: 10.1073/pnas.0507304103] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Nanotechnology-based materials are beginning to emerge as promising platforms for biomedical analysis, but measurement and control at the cell-chip interface remain challenging. This idea served as the basis for discussion in a focus group at the recent National Academies Keck Futures Initiative. In this Perspective, we first outline recent advances and limitations in measuring nanoscale mechanical, biochemical, and electrical interactions at the interface between biomaterials and living cells. Second, we present emerging experimental and conceptual platforms for probing living cells with nanotechnology-based tools in a microfluidic chip. Finally, we explore future directions and critical needs for engineering the cell-chip interface to create an integrated system capable of high-resolution analysis and control of cellular physiology.
Collapse
Affiliation(s)
- Brian P Helmke
- Department of Biomedical Engineering, University of Virginia, P.O. Box 800759, Charlottesville, VA 22908, USA.
| | | |
Collapse
|
16
|
Fuchs AB, Romani A, Freida D, Medoro G, Abonnenc M, Altomare L, Chartier I, Guergour D, Villiers C, Marche PN, Tartagni M, Guerrieri R, Chatelain F, Manaresi N. Electronic sorting and recovery of single live cells from microlitre sized samples. LAB ON A CHIP 2006; 6:121-6. [PMID: 16372078 DOI: 10.1039/b505884h] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Sorting and recovering specific live cells from samples containing less than a few thousand cells have become major hurdles in rare cell exploration such as stem cell research, cell therapy and cell based diagnostics. We describe here a new technology based on a microelectronic chip integrating an array of over 100,000 independent electrodes and sensors which allow individual and parallel single cell manipulation of up to 10,000 cells while maintaining viability and proliferation capabilities. Manipulation is carried out using dynamic dielectrophoretic traps controlled by an electronic interface. We also demonstrate the capabilities of the chip by sorting and recovering individual live fluorescent cells from an unlabeled population.
Collapse
Affiliation(s)
- Alexandra B Fuchs
- BioChip Lab/Laboratoire Biopuces - CEA, 17 rue des Martyrs, 38054, Grenoble cedex 9, France.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Litvinov RI, Bennett JS, Weisel JW, Shuman H. Multi-step fibrinogen binding to the integrin (alpha)IIb(beta)3 detected using force spectroscopy. Biophys J 2005; 89:2824-34. [PMID: 16040750 PMCID: PMC1366781 DOI: 10.1529/biophysj.105.061887] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2005] [Accepted: 06/20/2005] [Indexed: 01/15/2023] Open
Abstract
The regulated ability of integrin alphaIIbbeta3 to bind fibrinogen plays a crucial role in platelet aggregation and hemostasis. We have developed a model system based on laser tweezers, enabling us to measure specific rupture forces needed to separate single receptor-ligand complexes. First of all, we performed a thorough and statistically representative analysis of nonspecific protein-protein binding versus specific alphaIIbbeta3-fibrinogen interactions in combination with experimental evidence for single-molecule measurements. The rupture force distribution of purified alphaIIbbeta3 and fibrinogen, covalently attached to underlying surfaces, ranged from approximately 20 to 150 pN. This distribution could be fit with a sum of an exponential curve for weak to moderate (20-60 pN) forces, and a Gaussian curve for strong (>60 pN) rupture forces that peaked at 80-90 pN. The interactions corresponding to these rupture force regimes differed in their susceptibility to alphaIIbbeta3 antagonists or Mn2+, an alphaIIbbeta3 activator. Varying the surface density of fibrinogen changed the total binding probability linearly >3.5-fold but did not affect the shape of the rupture force distribution, indicating that the measurements represent single-molecule binding. The yield strength of alphaIIbbeta3-fibrinogen interactions was independent of the loading rate (160-16,000 pN/s), whereas their binding probability markedly correlated with the duration of contact. The aggregate of data provides evidence for complex multi-step binding/unbinding pathways of alphaIIbbeta3 and fibrinogen revealed at the single-molecule level.
Collapse
Affiliation(s)
- Rustem I Litvinov
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6085, USA
| | | | | | | |
Collapse
|
18
|
Barron JA, Krizman DB, Ringeisen BR. Laser printing of single cells: statistical analysis, cell viability, and stress. Ann Biomed Eng 2005; 33:121-30. [PMID: 15771266 DOI: 10.1007/s10439-005-8971-x] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Methods to print patterns of mammalian cells to various substrates with high resolution offer unique possibilities to contribute to a wide range of fields including tissue engineering, cell separation, and functional genomics. This manuscript details experiments demonstrating that BioLP Biological Laser Printing, can be used to rapidly and accurately print patterns of single cells in a noncontact manner. Human osteosarcoma cells were deposited into a biopolymer matrix, and after 6 days of incubation, the printed cells are shown to be 100% viable. Printing low numbers of cells per spot by BioLP is shown to follow a Poisson distribution, indicating that the reproducibility for the number of cells per spot is therefore determined not by the variance in printed volume per drop but by random sampling statistics. Potential cell damage during the laser printing process is also investigated via immunocytochemical studies that demonstrate minimal expression of heat shock proteins by printed cells. Overall, we find that BioLP is able to print patterns of osteosarcoma cells with high viability, little to no heat or shear damage to the cells, and at the ultimate single cell resolution.
Collapse
Affiliation(s)
- Jason A Barron
- Chemical Dynamics and Diagnostics Branch, Chemistry Division, Naval Research Laboratory, Washington, DC 20375, USA
| | | | | |
Collapse
|
19
|
Singh P, Aubry N. Trapping force on a finite-sized particle in a dielectrophoretic cage. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 72:016602. [PMID: 16090102 DOI: 10.1103/physreve.72.016602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2005] [Indexed: 05/03/2023]
Abstract
The point dipole (PD) model is routinely used for estimating the dielectrophoretic (DEP) force acting on a particle placed in the nonuniform electric fields of dielectrophoresis devices, such as square cages. We show that if the particle size is much smaller than the dielectrophoretic cage size, the PD model accurately approximates the actual DEP force, computed numerically using the Maxwell stress tensor method. However, when the two sizes are comparable, the actual DEP force differs significantly in both magnitude and direction from that given by the PD model.
Collapse
Affiliation(s)
- P Singh
- Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
| | | |
Collapse
|
20
|
Korlach J, Reichle C, Müller T, Schnelle T, Webb WW. Trapping, deformation, and rotation of giant unilamellar vesicles in octode dielectrophoretic field cages. Biophys J 2005; 89:554-62. [PMID: 15863477 PMCID: PMC1366554 DOI: 10.1529/biophysj.104.050401] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The behavior of freestanding lipid bilayer membranes under the influence of dielectric force potentials was studied by trapping, holding, and rotating individual giant unilamellar vesicles (GUVs) inside dielectrophoretic microfield cages. Using laser scanning confocal microscopy and three-dimensional image reconstructions of GUVs labeled with fluorescent membrane probes, field strength and frequency-dependent vesicle deformations were observed which are explained by calculations of the dielectric force potentials inside the cage. Dynamical membrane properties under the influence of the field cage were studied by fluorescence correlation spectroscopy, circumventing potential artifacts associated with measurements involving GUV immobilization on support surfaces. Lipid transport could be accelerated markedly by the applied fields, aided by hydrodynamic fluid streaming which was also studied by fluorescence correlation spectroscopy.
Collapse
Affiliation(s)
- J Korlach
- School of Applied & Engineering Physics, Clark Hall, Cornell University, Ithaca, New York, USA
| | | | | | | | | |
Collapse
|
21
|
Abstract
Many efforts are currently underway to try and mimic the properties of single cells with the aim of designing chips that are as efficient as cells. However, cells are nature's nanotechnology engineering at the scale of atoms and molecules, and it might be better to envision a microchip that utilizes a single cell as an experimentation platform. A novel, so-called laboratory-in-a-cell concept has been described, where advantage is taken of micro- and nanotechnological tools to enable precise control of the biochemical cellular environment; these tools also offer the possibility to analyse the composition of single cells. Methods for single-cell handling and analysis are being developed and will be required for this concept to progress further.
Collapse
Affiliation(s)
- Helene Andersson
- MESA+ Institute, University of Twente BIOS, the Lab-on-a-Chip Group, PO Box 217, 7500 AE Enschede, The Netherlands
| | | |
Collapse
|
22
|
Roux P, Münter S, Frischknecht F, Herbomel P, Shorte SL. Focusing light on infection in four dimensions. Cell Microbiol 2004; 6:333-43. [PMID: 15009025 DOI: 10.1111/j.1462-5822.2004.00374.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The fusion of cell biology with microbiology has bred a new discipline, cellular microbiology, in which the primary aim is to understand host-pathogen interactions at a tissue, cellular and molecular level. In this context, we require techniques allowing us to probe infection in situ and extrapolate quantitative information on its spatiotemporal dynamics. To these ends, fluorescent light-based imaging techniques offer a powerful tool, and the state-of-the-art is defined by paradigms using so-called multidimensional (multi-D) imaging microscopy. Multi-D imaging aims to visualize and quantify biological events through time and space and, more specifically, refers to combinations of: three (3D, volume), four (4D, time) and five (5D, multiwavelength)-dimensional recordings. Successful multi-D imaging depends upon understanding the available technologies and their limitations. This is especially true in the field of microbiology where visualization of infectious/pathogenic activities inside living host systems presents particular technical challenges. Thus, as multi-D imaging rapidly becomes a common bench tool to the cellular microbiologist, this review provides the new user with some of the necessary technical insight required to get the best from these methods.
Collapse
Affiliation(s)
- Pascal Roux
- Plate-forme d'Imagerie Dynamique (PFID), Institut Pasteur, 25-28 rue du Dr Roux, 75015 Paris, France
| | | | | | | | | |
Collapse
|
23
|
Müller T, Pfennig A, Klein P, Gradl G, Jäger M, Schnelle T. The potential of dielectrophoresis for single-cell experiments. ACTA ACUST UNITED AC 2003; 22:51-61. [PMID: 15007991 DOI: 10.1109/memb.2003.1266047] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Torsten Müller
- Evotec Technologies GmbH, c/o Humbolt University of Berlin, Invalidenstrasse 42, 10115 Berlin
| | | | | | | | | | | |
Collapse
|
24
|
Huang W, Anvari B, Torres JH, LeBaron RG, Athanasiou KA. Temporal effects of cell adhesion on mechanical characteristics of the single chondrocyte. J Orthop Res 2003; 21:88-95. [PMID: 12507584 DOI: 10.1016/s0736-0266(02)00130-4] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Cell adhesion to material surfaces is a fundamental phenomenon in tissue response to implanted devices, and an important consideration in tissue engineering. For example, elucidation of phenomena associated with adhesion of chondrocytes to biomaterials is critical in addressing the difficult problem of articular cartilage regeneration. The first objective of this study was to measure the mechanical adhesiveness characteristics of individual rabbit articular chondrocytes as a function of seeding time to provide further understanding of the cell adhesion process. The second objective was to quantify the force required to separate the plasma membrane from the underlying cytoskeleton as a function of seeding time. After culturing chondrocytes on glass coverslips for 1, 2, 4, 6 h, two biomechanical tests were performed on single chondrocytes: (i) mechanical adhesiveness measurement by the cytodetacher; and (ii) plasma membrane tether formation force measurement by optical tweezers. Cell mechanical adhesiveness increased from 231+/-149 Pa at 1 h to 1085+/-211 Pa at 6 h. The cell contact area with the substrata increased from 161+/-52 microm(2) at 1 h to 369+/-105 microm(2) at 6 h. The tether formation force increased from 232+/-23 pN at 1 h to 591+/-17 pN at 6 h. Moreover, fluorescence staining by rhodamine-phalloidin demonstrated the process of actin spreading within the cytoskeleton from 0.5 to 6 h and allowed for measurement of cell height which was found to decrease from 12.3+/-2.9 microm at 0.5 h to 6.2+/-0.9 microm at 6 h.
Collapse
Affiliation(s)
- Wei Huang
- Department of Bioengineering, Rice University, MS 142, P.O. Box 1892, Houston, TX 77251-1892, USA
| | | | | | | | | |
Collapse
|
25
|
Kulin S, Kishore R, Hubbard JB, Helmerson K. Real-time measurement of spontaneous antigen-antibody dissociation. Biophys J 2002; 83:1965-73. [PMID: 12324415 PMCID: PMC1302286 DOI: 10.1016/s0006-3495(02)73958-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
We report observations in real time of thermally driven adhesion and dissociation between a monoclonal IgE antibody and its specific antigen N-epsilon-2,4-dinitrophenyl-L-lysine. Both molecules were attached to the surfaces of different polystyrene microspheres trapped by optical tweezers. Monitoring spontaneous successive attachment and detachment events allowed a direct determination of the reaction-limited detachment rate k(off) for a single bond and also for multiple bonds. We observed both positive and negative cooperativity between multiple bonds depending on whether the antigen was linked to the microsphere with or without a tether, respectively.
Collapse
Affiliation(s)
- Simone Kulin
- Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | | | | | | |
Collapse
|
26
|
Abstract
Microfabricated bioanalytical devices (also referred to as laboratory-on-a-chip or micro-TAS) offer highly efficient platforms for simultaneous analysis of a large number of biologically important molecules, possessing great potential for genome, proteome and metabolome studies. Development and implementation of microfluidic-based bioanalytical tools involves both established and evolving technologies, including microlithography, micromachining, micro-electromechanical systems technology and nanotechnology. This article provides an overview of the latest developments in the key device subject areas and the basic interdisciplinary technologies. Important aspects of DNA and protein analysis, interfacing issues and system integration are all thoroughly discussed, along with applications for this novel "synergized" technology in high-throughput separations of biologically important molecules. This review also gives a better understanding of how to utilize these technologies as well as to provide appropriate technical solutions to problems perceived as being more fundamental.
Collapse
|