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Breukers J, Ven K, Struyfs C, Ampofo L, Rutten I, Imbrechts M, Pollet F, Van Lent J, Kerstens W, Noppen S, Schols D, De Munter P, Thibaut HJ, Vanhoorelbeke K, Spasic D, Declerck P, Cammue BPA, Geukens N, Thevissen K, Lammertyn J. FLUIDOT: A Modular Microfluidic Platform for Single-Cell Study and Retrieval, with Applications in Drug Tolerance Screening and Antibody Mining. SMALL METHODS 2023; 7:e2201477. [PMID: 36642827 DOI: 10.1002/smtd.202201477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Advancements in lab-on-a-chip technologies have revolutionized the single-cell analysis field. However, an accessible platform for in-depth screening and specific retrieval of single cells, which moreover enables studying diverse cell types and performing various downstream analyses, is still lacking. As a solution, FLUIDOT is introduced, a versatile microfluidic platform incorporating customizable microwells, optical tweezers and an interchangeable cell-retrieval system. Thanks to its smart microfluidic design, FLUIDOT is straightforward to fabricate and operate, rendering the technology widely accessible. The performance of FLUIDOT is validated and its versatility is subsequently demonstrated in two applications. First, drug tolerance in yeast cells is studied, resulting in the discovery of two treatment-tolerant populations. Second, B cells from convalescent COVID-19 patients are screened, leading to the discovery of highly affine, in vitro neutralizing monoclonal antibodies against SARS-CoV-2. Owing to its performance, flexibility, and accessibility, it is foreseen that FLUIDOT will enable phenotypic and genotypic analysis of diverse cell samples and thus elucidate unexplored biological questions.
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Affiliation(s)
- Jolien Breukers
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
- LISCO, KU Leuven Institute for Single Cell Omics, ON4 Herestraat 49, Leuven, 3000, Belgium
| | - Karen Ven
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
- LISCO, KU Leuven Institute for Single Cell Omics, ON4 Herestraat 49, Leuven, 3000, Belgium
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
| | - Caroline Struyfs
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, Leuven, 3001, Belgium
| | - Louanne Ampofo
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, ON 2 Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Therapeutic and Diagnostic Antibodies, KU Leuven, ON2 Herestraat 49, Leuven, 3000, Belgium
| | - Iene Rutten
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
- LISCO, KU Leuven Institute for Single Cell Omics, ON4 Herestraat 49, Leuven, 3000, Belgium
| | - Maya Imbrechts
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, ON 2 Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Therapeutic and Diagnostic Antibodies, KU Leuven, ON2 Herestraat 49, Leuven, 3000, Belgium
| | - Francesca Pollet
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
| | - Julie Van Lent
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
| | - Winnie Kerstens
- Translational Platform Virology and Chemotherapy, Rega Institute, KU Leuven, Rega - Herestraat 49, Leuven, 3000, Belgium
| | - Sam Noppen
- Laboratory of Virology and Chemotherapy, Rega Institute, KU Leuven, Rega - Herestraat 49, Leuven, 3000, Belgium
| | - Dominique Schols
- Laboratory of Virology and Chemotherapy, Rega Institute, KU Leuven, Rega - Herestraat 49, Leuven, 3000, Belgium
| | - Paul De Munter
- Department of Internal Medicine, University Hospitals Leuven, UZ Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Clinical Infectious and Inflammatory Disorders, KU Leuven, UZ Herestraat 49, Leuven, 3000, Belgium
| | - Hendrik Jan Thibaut
- Translational Platform Virology and Chemotherapy, Rega Institute, KU Leuven, Rega - Herestraat 49, Leuven, 3000, Belgium
| | - Karen Vanhoorelbeke
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, ON 2 Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Thrombosis Research, KU Leuven Campus Kulak Kortrijk, Etienne Sabbelaan 53, Kortrijk, 8500, Belgium
| | - Dragana Spasic
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
| | - Paul Declerck
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, ON 2 Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Therapeutic and Diagnostic Antibodies, KU Leuven, ON2 Herestraat 49, Leuven, 3000, Belgium
| | - Bruno P A Cammue
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, Leuven, 3001, Belgium
| | - Nick Geukens
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- PharmAbs, The KU Leuven Antibody Center, KU Leuven, ON 2 Herestraat 49, Leuven, 3000, Belgium
- Laboratory for Therapeutic and Diagnostic Antibodies, KU Leuven, ON2 Herestraat 49, Leuven, 3000, Belgium
| | - Karin Thevissen
- Centre of Microbial and Plant Genetics, KU Leuven, Kasteelpark Arenberg 20, Leuven, 3001, Belgium
| | - Jeroen Lammertyn
- Department of Biosystems, Biosensors group, KU Leuven, Willem de Croylaan 42, Leuven, 3001, Belgium
- LISCO, KU Leuven Institute for Single Cell Omics, ON4 Herestraat 49, Leuven, 3000, Belgium
- MabMine: KU Leuven Single B Cell Mining Platform, KU Leuven, ON2 Herestraat 49, 3000, Leuven, Belgium
- LIMNI, KU Leuven Institute for Micro- and Nanoscale Integration, Celestijnenlaan 200F, Leuven, 3001, Belgium
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2
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Manzoor AA, Romita L, Hwang DK. A review on microwell and microfluidic geometric array fabrication techniques and its potential applications in cellular studies. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23875] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ahmad Ali Manzoor
- Department of Chemical Engineering Ryerson University Toronto Ontario Canada
- Keenan Research Centre for Biomedical Science St. Michael's Hospital Toronto Ontario Canada
- Institute for Biomedical Engineering Science and Technology (iBEST) A partnership between Ryerson University and St. Michael's Hospital Toronto Ontario Canada
| | - Lauren Romita
- Department of Chemical Engineering Ryerson University Toronto Ontario Canada
- Keenan Research Centre for Biomedical Science St. Michael's Hospital Toronto Ontario Canada
- Institute for Biomedical Engineering Science and Technology (iBEST) A partnership between Ryerson University and St. Michael's Hospital Toronto Ontario Canada
| | - Dae Kun Hwang
- Department of Chemical Engineering Ryerson University Toronto Ontario Canada
- Keenan Research Centre for Biomedical Science St. Michael's Hospital Toronto Ontario Canada
- Institute for Biomedical Engineering Science and Technology (iBEST) A partnership between Ryerson University and St. Michael's Hospital Toronto Ontario Canada
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3
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Luan Q, Macaraniag C, Zhou J, Papautsky I. Microfluidic systems for hydrodynamic trapping of cells and clusters. BIOMICROFLUIDICS 2020; 14:031502. [PMID: 34992704 PMCID: PMC8719525 DOI: 10.1063/5.0002866] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/07/2020] [Indexed: 05/07/2023]
Abstract
Microfluidic devices have been widely applied to trapping and isolation of cells and clusters for controllable intercellular environments and high-throughput analysis, triggering numerous advances in disease diagnosis and single-cell analysis. Passive hydrodynamic cell trapping is one of the simple and effective methods that has been gaining attention in recent years. Our aim here is to review the existing passive microfluidic trapping approaches, including microposts, microfiltration, microwells, and trapping chambers, with emphasis on design principles and performance. We summarize the remarkable advances that hydrodynamic trapping methods offer, as well as the existing challenges and prospects for development. Finally, we hope that an improved understanding of hydrodynamic trapping approaches can lead to sophisticated and useful platforms to advance medical and biological research.
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Affiliation(s)
- Qiyue Luan
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | - Celine Macaraniag
- Department of Bioengineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA
| | | | - Ian Papautsky
- Author to whom correspondence should be addressed:. Tel.: +1 312 413 3800
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4
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Sohrabi Kashani A, Packirisamy M. Efficient Low Shear Flow-based Trapping of Biological Entities. Sci Rep 2019; 9:5511. [PMID: 30940862 PMCID: PMC6445139 DOI: 10.1038/s41598-019-41938-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 03/11/2019] [Indexed: 11/09/2022] Open
Abstract
Capturing cells or biological entities is an important and challenging step toward in-vitro studies of cells under a precisely controlled microscale environment. In this work, we have developed a compact and efficient microdevice for on-chip trapping of micro-sized particles. This hydrodynamics-based trapping system allows the isolation of polystyrene micro-particles with a shorter time while inducing a less hydrodynamic deformation and stress on the particles or cells both after and before trapping. A numerical simulation was carried out to design a hydrodynamic trapping mechanism and optimize the geometric and fluidic parameters affecting the trapping efficiency of the microfluidic network. By using the finite element analysis, the velocity field, pressure field, and hydrodynamic force on the micro particles were studied. Finally, a PDMS microfluidic device was fabricated to test the device's ability to trap polystyrene microspheres. Computational fluid analysis and experimental testing showed a high trapping efficiency that is more than 90%. This microdevice can be used for single cell studies including their biological, physical and chemical characterization.
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Affiliation(s)
- Ahmad Sohrabi Kashani
- Optical Bio Microsystem Lab, Mechanical, Industrial, and Aerospace Engineering Department, Concordia University, Montreal, Quebec, H3G 1M8, Canada
| | - Muthukumaran Packirisamy
- Optical Bio Microsystem Lab, Mechanical, Industrial, and Aerospace Engineering Department, Concordia University, Montreal, Quebec, H3G 1M8, Canada.
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5
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Voyton CM, Choi J, Qiu Y, Morris MT, Ackroyd PC, Morris JC, Christensen KA. A Microfluidic-Based Microscopy Platform for Continuous Interrogation of Trypanosoma brucei during Environmental Perturbation. Biochemistry 2019; 58:875-882. [PMID: 30638014 DOI: 10.1021/acs.biochem.8b01269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The African trypanosome, Trypanosoma brucei, is the causative agent of human African trypanosomiasis (HAT). African trypanosomes are extracellular parasites that possess a single flagellum that imparts a high degree of motility to the microorganisms. In addition, African trypanosomes show significant metabolic and structural adaptation to environmental conditions. Analysis of the ways that environmental cues affect these organisms generally requires rapid perfusion experiments in combination with single-cell imaging, which are difficult to apply under conditions of rapid motion. Microfluidic devices have been used previously as a strategy for trapping small motile cells in a variety of organisms, including trypanosomes; however, in the past, such devices required individual fabrication in a cleanroom, limiting their application. Here we demonstrate that a commercial microfluidic device, typically used for bacterial trapping, can trap bloodstream and procyclic form trypanosomes, allowing for rapid buffer exchange via perfusion. As a result, time-lapse single-cell microscopy images of these highly motile parasites were acquired during environmental variations. Using these devices, we have been able to perform and analyze perfusion-based single-cell tracking experiments of the responses of the parasite to changes in glucose availability, which is a major step in resolving the mechanisms of adaptation of kinetoplasts to their individual biological niches; we demonstrate utility of this tool for making measurements of procyclic form trypanosome intracellular glucose levels as a function of changes in extracellular glucose concentrations. These experiments demonstrate that cytosolic glucose equilibrates with external conditions as fast as, or faster than, the rate of solution exchange in the instrument.
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Affiliation(s)
- Charles M Voyton
- Department of Chemistry , Clemson University , Clemson , South Carolina 29634 , United States.,Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
| | - Jongsu Choi
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
| | - Yijian Qiu
- Eukaryotic Pathogens Innovation Center, Department of Genetics and Biochemistry , Clemson University , Clemson , South Carolina 29634 , United States
| | - Meredith T Morris
- Eukaryotic Pathogens Innovation Center, Department of Genetics and Biochemistry , Clemson University , Clemson , South Carolina 29634 , United States
| | - P Christine Ackroyd
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
| | - James C Morris
- Eukaryotic Pathogens Innovation Center, Department of Genetics and Biochemistry , Clemson University , Clemson , South Carolina 29634 , United States
| | - Kenneth A Christensen
- Department of Chemistry , Clemson University , Clemson , South Carolina 29634 , United States.,Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84602 , United States
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6
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Sauzade M, Brouzes E. Deterministic trapping, encapsulation and retrieval of single-cells. LAB ON A CHIP 2017; 17:2186-2192. [PMID: 28585962 PMCID: PMC5541261 DOI: 10.1039/c7lc00283a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We present a novel method for conducting true single-cell encapsulation at very high efficiency for the manipulation of precious samples. Our unique strategy is based on the sequential capture and original encapsulation of single-cells into a series of hydrodynamic traps. We identified two distinct modes of encapsulation and we established their associated design rules. We improved the trapping scheme to reach a near perfect capture efficiency and make it compatible with the encapsulation process. Finally, we developed the complete device operation that permits highly efficient single-cell encapsulation and droplet retrieval. This platform provides the foundation to a fully integrated multiparameter platform that will impact the analysis of tissues at single-cell resolution.
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Affiliation(s)
- M Sauzade
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, NY 11794-5281, USA.
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7
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Oono M, Yamaguchi K, Rasyid A, Takano A, Tanaka M, Futai N. Reconfigurable microfluidic device with discretized sidewall. BIOMICROFLUIDICS 2017; 11:034103. [PMID: 28503247 PMCID: PMC5415406 DOI: 10.1063/1.4983148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
Various microfluidic features, such as traps, have been used to manipulate flows, cells, and other particles within microfluidic systems. However, these features often become undesirable in subsequent steps requiring different fluidic configurations. To meet the changing needs of various microfluidic configurations, we developed a reconfigurable microfluidic channel with movable sidewalls using mechanically discretized sidewalls of laterally aligned rectangular pins. The user can deform the channel sidewall at any time after fabrication by sliding the pins. We confirmed that the flow resistance of the straight microchannel could be reversibly adjusted in the range of 101-105 Pa s/μl by manually displacing one of the pins comprising the microchannel sidewall. The reconfigurable microchannel also made it possible to manipulate flows and cells by creating a segmented patterned culture of COS-7 cells and a coculture of human umbilical vein endothelial cells (HUVECs) and human lung fibroblasts (hLFs) inside the microchannel. The reconfigurable microfluidic device successfully maintained a culture of COS-7 cells in a log phase throughout the entire period of 216 h. Furthermore, we performed a migration assay of cocultured HUVEC and hLF spheroids within one microchannel and observed their migration toward each other.
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Affiliation(s)
- Masahiro Oono
- Department of Mechanical Engineering, Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
| | - Keisuke Yamaguchi
- Department of Mechanical Engineering, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
| | - Amirul Rasyid
- Department of Mechanical Engineering, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
| | - Atsushi Takano
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, 8 Somapah Rd, Singapore 487372
| | - Masato Tanaka
- Department of Materials and Life Sciences, School of Science and Engineering, Tokyo Denki University, Ishizaka, Hatoyama-machi, Hiki-gun, Saitama 350-0394, Japan
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8
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Tran QD, Kong TF, Hu D, Lam RHW. Deterministic sequential isolation of floating cancer cells under continuous flow. LAB ON A CHIP 2016; 16:2813-9. [PMID: 27387093 DOI: 10.1039/c6lc00615a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Isolation of rare cells, such as circulating tumor cells, has been challenging because of their low abundance and limited timeframes of expressions of relevant cell characteristics. In this work, we devise a novel hydrodynamic mechanism to sequentially trap and isolate floating cells in biosamples. We develop a microfluidic device for the sequential isolation of floating cancer cells through a series of microsieves to obtain up to 100% trapping yield and >95% sequential isolation efficiency. We optimize the trappers' dimensions and locations through both computational and experimental analyses using microbeads and cells. Furthermore, we investigated the functional range of flow rates for effective sequential cell isolation by taking the cell deformability into account. We verify the cell isolation ability using the human breast cancer cell line MDA-MB-231 with perfect agreement with the microbead results. The viability of the isolated cells can be maintained for direct identification of any cell characteristics within the device. We further demonstrate that this device can be applied to isolate the largest particles from a sample containing multiple sizes of particles, revealing its possible applicability in isolation of circulating tumor cells in cancer patients' blood. Our study provides a promising sequential cell isolation strategy with high potential for rapid detection and analysis of general floating cells, including circulating tumor cells and other rare cell types.
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Affiliation(s)
- Quang D Tran
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
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9
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Guan A, Wang Y, Phillips KS, Li Z. A contact-lens-on-a-chip companion diagnostic tool for personalized medicine. LAB ON A CHIP 2016; 16:1152-1156. [PMID: 26923038 DOI: 10.1039/c6lc00034g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a novel, microfluidic platform that integrates human tears (1 μL) with commercial contact lens materials to provide personalized assessment of lens care solution performance. This device enabled the detection of significant differences in cleaning and disinfection outcomes between subjects and between biofilms vs. planktonic bacteria.
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Affiliation(s)
- Allan Guan
- Department of Biomedical Engineering, The George Washington University, 800 22nd Street NW, Washington, DC 20052, USA.
| | - Yi Wang
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD 20993, USA.
| | - K Scott Phillips
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD 20993, USA.
| | - Zhenyu Li
- Department of Biomedical Engineering, The George Washington University, 800 22nd Street NW, Washington, DC 20052, USA.
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10
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Affiliation(s)
- Sanjin Hosic
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Shashi K. Murthy
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
- Barnett Institute of Chemical and Biological Analysis, Northeastern University, Boston, MA, USA
| | - Abigail N. Koppes
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
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11
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Yesilkoy F, Ueno R, Desbiolles BXE, Grisi M, Sakai Y, Kim BJ, Brugger J. Highly efficient and gentle trapping of single cells in large microfluidic arrays for time-lapse experiments. BIOMICROFLUIDICS 2016; 10:014120. [PMID: 26909126 PMCID: PMC4760974 DOI: 10.1063/1.4942457] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 02/09/2016] [Indexed: 05/24/2023]
Abstract
The isolation of single biological cells and their further cultivation in dedicated arrayed chambers are key to the collection of statistically reliable temporal data in cell-based biological experiments. In this work, we present a hydrodynamic single cell trapping and culturing platform that facilitates cell observation and experimentation using standard bio-lab equipment. The proposed design leverages the stochastic position of the cells as they flow into the structured microfluidic channels, where hundreds of single cells are then arrayed in nanoliter chambers for simultaneous cell specific data collection. Numerical simulation tools are used to devise and implement a hydrodynamic cell trapping mechanism that is minimally detrimental to the cell cycle and retains high overall trapping efficiency (∼70%) with the capability of reaching high fill factors (>90%) in short loading times (1-4 min) in a 400-trap device. A Monte Carlo model is developed using the design parameters to estimate the system trapping efficiencies, which show strong agreement with the experimentally acquired data. As proof of concept, arrayed mammalian tissue cells (MIA PaCa-2) are cultured in the microfluidic chambers for two days without viability problems.
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Affiliation(s)
| | - R Ueno
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - B X E Desbiolles
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
| | - M Grisi
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
| | - Y Sakai
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - B J Kim
- Institute of Industrial Science, The University of Tokyo , Meguro-ku, Tokyo 153-8505, Japan
| | - J Brugger
- Microsystems Laboratory, Ecole Polytechnique Federale de Lausanne , 1015 Lausanne, Switzerland
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12
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Liu W, Chen W, Liu R, Ou Y, Liu H, Xie L, Lu Y, Li C, Li B, Cheng J. Separation of sperm and epithelial cells based on the hydrodynamic effect for forensic analysis. BIOMICROFLUIDICS 2015; 9:044127. [PMID: 26392829 PMCID: PMC4560716 DOI: 10.1063/1.4928453] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 07/30/2015] [Indexed: 06/05/2023]
Abstract
In sexual assault cases, forensic samples are a mixture of sperm from the perpetrator and epithelial cells from the victim. To obtain an independent short tandem repeat (STR) profile of the perpetrator, sperm cells must be separated from the mixture of cells. However, the current method used in crime laboratories, namely, differential extraction, is a time-consuming and labor-intensive process. To achieve a rapid and automated sample pretreatment process, we fabricated a microdevice for hydrodynamic and size-based separation of sperm and epithelial cells. When cells in suspension were introduced into the device's microfluidic channels, they were forced to flow along different streamlines and into different outlets due to their different diameters. With the proposed microdevice, sperm can be separated within a short period of time (0.5 h for a 50-μl mock sample). The STR profiles of the products in the sperm outlet reservoir demonstrated that a highly purified male DNA fraction could be obtained (94.0% male fraction). This microdevice is of low-cost and can be easily integrated with other subsequent analysis units, providing great potential in the process of analyzing sexual assault evidence as well as in other areas requiring cell sorting.
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Affiliation(s)
| | | | - Ran Liu
- Department of Biomedical Engineering, Tsinghua University School of Medicine , Beijing 100084, China
| | - Yuan Ou
- Beijing Engineering Research Center of Crime Scene Evidence Examination, Institute of Forensic Science , Beijing 100038, China
| | | | | | | | - Caixia Li
- Beijing Engineering Research Center of Crime Scene Evidence Examination, Institute of Forensic Science , Beijing 100038, China
| | - Bin Li
- Fujian Provincial Key Laboratory of Forensic Science and Technology , Forensic Science Division, Department of Fujian Provincial Public Security, Fuzhou 350003, China
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13
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Guan A, Shenoy A, Smith R, Li Z. Streamline based design guideline for deterministic microfluidic hydrodynamic single cell traps. BIOMICROFLUIDICS 2015; 9:024103. [PMID: 25825618 PMCID: PMC4352164 DOI: 10.1063/1.4914469] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 02/27/2015] [Indexed: 05/03/2023]
Abstract
A prerequisite for single cell study is the capture and isolation of individual cells. In microfluidic devices, cell capture is often achieved by means of trapping. While many microfluidic trapping techniques exist, hydrodynamic methods are particularly attractive due to their simplicity and scalability. However, current design guidelines for single cell hydrodynamic traps predominantly rely on flow resistance manipulation or qualitative streamline analysis without considering the target particle size. This lack of quantitative design criteria from first principles often leads to non-optimal probabilistic trapping. In this work, we describe an analytical design guideline for deterministic single cell hydrodynamic trapping through the optimization of streamline distributions under laminar flow with cell size as a key parameter. Using this guideline, we demonstrate an example design which can achieve 100% capture efficiency for a given particle size. Finite element modelling was used to determine the design parameters necessary for optimal trapping. The simulation results were subsequently confirmed with on-chip microbead and white blood cell trapping experiments.
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Affiliation(s)
- Allan Guan
- Department of Biomedical Engineering, The George Washington University , Washington, District of Columbia 20052, USA
| | - Aditi Shenoy
- Department of Biomedical Engineering, The George Washington University , Washington, District of Columbia 20052, USA
| | - Richard Smith
- Department of Biomedical Engineering, The George Washington University , Washington, District of Columbia 20052, USA
| | - Zhenyu Li
- Department of Biomedical Engineering, The George Washington University , Washington, District of Columbia 20052, USA
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